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Subject: Environment

  • Mahendragiri Hills

    The Odisha government has proposed a second biosphere reserve in the southern part of the state at Mahendragiri, a hill ecosystem having a rich biodiversity.

    The 5,569-square kilometre Similipal Biosphere Reserve is Odisha’s first such reserve and was notified May 20, 1996.

    Mahendragiri Hills

    • Mahendragiri is a mountain in the Rayagada subdivision of the district of Gajapati, Odisha, India.
    • It is situated amongst the Eastern Ghats at an elevation of 1,501 metres.
    • The hill and its surrounding areas are recognized as a biodiversity hot spot due to numerous medicinal plants and other species that are found here.
    • Mahendragiri is inhabited by the Soura people, a particularly vulnerable tribal group as well as the Kandha tribe.

    Try this PYQ:

    Q.From the ecological point of view, which one of the following assumes importance in being a good link between the Eastern Ghats and the Western Ghats? (CSP 2018)

    (a) Sathyamangalam Tiger Reserve

    (b) Nallamala Forest

    (c) Nagarhole National Park

    (d) Seshachalam Biosphere Reserve

    Why designate it as a biosphere reserve?

    • The area of the proposed Mahendragiri Biosphere Reserve is around 470,955 hectares and is spread over Gajapati and Ganjam districts in the Eastern Ghats.
    • The hill ecosystem acts as a transitional zone between the flora and fauna of southern India and the Himalayas, making the region an ecological estuary of genetic diversities.
    • The rich flora in Mahendragiri represents 40 per cent of the reported flora of Odisha, with around 1,358 species of plants.

    Back2Basics:  Biosphere Reserves

    • A biosphere reserve is an area of land or water that is protected by law in order to support the conservation of ecosystems, as well as the sustainability of mankind’s impact on the environment.
    • Each reserve aims to help scientists and the environmental community figure out how to protect the world’s plant and animal species while dealing with a growing population and its resource needs.
    • To carry out the complementary activities of biodiversity conservation and sustainable use of natural resources, biosphere reserves are traditionally organized into 3 interrelated zones, known as:
      1. the core area
      2. the buffer zone and
      3. a transition zone or ‘area of cooperation

  • Why forest fires break out in the spring?

    Uttarakhand has witnessed over 1,000 incidents of a forest fire over the last six months, including 45 in the last 24 hours alone.

    Forest fires this year

    • Since the start of 2021, there has been a series of forest fires in the Himachal Pradesh, Nagaland-Manipur border, Odisha, Madhya Pradesh, and Gujarat, including in wildlife sanctuaries.
    • April-May is the season when forest fires take place in various parts of the country.
    • But forest fires have been more frequent than usual in Uttarakhand and have also taken place during winter; dry soil caused by a weak monsoon is being seen as one of the causes.

    As of 2019, about 21.67% of the country’s geographical area is identified as forest, according to the India State of Forest Report 2019 (ISFR) released by the Forest Survey of India (FSI).  Tree cover makes up another 2.89% (95, 027 sq km).

    How vulnerable are forests in Uttarakhand?

    • Uttarakhand and Himachal Pradesh are the two states that witness the most frequent forest fires annually.
    • In Uttarakhand, 24,303 sq km (over 45 per cent of the geographical area) is under forest cover.

    What causes forest fires?

    • Forest fires can be caused by a number of natural causes, but officials say many major fires in India are triggered mainly by human activities.
    • Emerging studies link climate change to rising instances of fires globally, especially the massive fires of the Amazon forests in Brazil and in Australia in the last two years.
    • Fires of longer duration, increasing intensity, higher frequency and highly inflammable nature are all being linked to climate change.
    • In India, forest fires are most commonly reported during March and April, when the ground has large quantities of dry wood, logs, dead leaves, stumps, dry grass and weeds that can make forests easily go up in flames if there is a trigger.
    • Under natural circumstances, extreme heat and dryness, friction created by rubbing of branches with each other also have been known to initiate fire.

    Why Uttarakhand?

    • In Uttarakhand, the lack of soil moisture too is being seen as a key factor. In two consecutive monsoon seasons (2019 and 2020), rainfall has been deficient by 18% and 20% of the seasonal average, respectively.
    • But, forest officials say most fires are man-made, sometimes even deliberately caused.
    • Even a small spark from a cigarette butt, or a carelessly discarded lit matchstick can set the fire going.
    • For example, in Odisha, which saw a major fire last month in Simlipal forest, villagers are known to set dry leaves to fire in order to collect mahua flowers, which go into preparation of a local drink.

    Why are forest fires difficult to control?

    • The locality of the forest and access to it pose hurdles in initiating firefighting efforts.
    • During peak season, shortage of staff is another challenge in dispatching firefighting teams.
    • Timely mobilization of forest staff, fuel and equipment, depending on the type of fire, through the thick forests, remain challenges.
    • As it is impossible to transport heavy vehicles loaded with water into the thick forests, a majority of fire dousing is initiated manually, using blowers and similar devices.
    • But there have been incidents when forest fires were brought under control using helicopter services.
    • Wind speed and direction play a critical role in bringing a forest fire under control. The fire often spreads in the direction of the winds and towards higher elevations.

    What factors make forest fires a concern?

    Forests play an important role in mitigation and adaptation to climate change.

    • Carbon emission: They act as a sink, reservoir and source of carbon.
    • Livelihood loss: In India, with 1.70 lakh villages in close proximity to forests (Census 2011), the livelihood of several crores of people is dependent on fuelwood, bamboo, fodder, and small timber.
    • Destruction of animals’ habitat: Heat generated during the fire destroys animal habitats. Soil quality decreases with the alteration in their compositions.
    • Soil degradation: Soil moisture and fertility, too, is affected. Thus forests can shrink in size. The trees that survive fire often remain stunted and growth is severely affected.

    Various efforts taken

    • Since 2004, the FSI developed the Forest Fire Alert System to monitor forest fires in real-time.
    • In its advanced version launched in January 2019, the system now uses satellite information gathered from NASA and ISRO.
    • Real-time fire information from identified fire hotspots is gathered using MODIS sensors (1km by 1km grid) and electronically transmitted to FSI.
    • This information is then relayed via email at state, district, circle, division, range, beat levels. Users of this system in the locality are issued SMS alerts.

  • How Asian desert dust enhances Indian summer monsoon?

    A new study has revealed how dust coming from the deserts in West, Central and East Asia plays an important role in the Indian Summer Monsoon.

    Try this PYQ:

    With reference to ‘Indian Ocean Dipole (IOD)’, sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct?

    1. IOD phenomenon is characterized by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.
    2. An IOD phenomenon can influence an El Nino’s impact on the monsoon.

    Select the correct Option using the code given below:

    (a) Only 1

    (b) Only 2

    (c) Both 1 and 2

    (d) Neither 1 nor 2

    Why study dust?

    • Many studies have shown that the dust emission scheme is extremely sensitive to climate change.
    • Understanding these mechanisms and effects of dust will help us understand our monsoon systems in the face of global climate change.

    Impact of dust on Indian Monsoon

    • Dust swarms from the desert when lifted by strong winds can absorb solar radiation and become hot.
    • This can cause heating of the atmosphere, change the air pressure, wind circulation patterns, influence moisture transport and increase precipitation and rainfall.
    • A strong monsoon can also transport air to West Asia and again pick up a lot of dust.
    • The researchers say this is a positive feedback loop.

    Role of the Iranian plateau

    • Not just the dust from the Middle East, the Iranian Plateau also influences the Indian Summer Monsoon.
    • The hot air over the Iranian Plateau can heat the atmosphere over the plateau, strengthen the circulation over the deserts of the Arabian Peninsula and increase dust emission from the Middle East.
    • The researchers also explain how the Indian Summer Monsoon has a reverse effect and can increase the winds in West Asia to produce yet more dust.

    Transported aerosols

    • Deserts across the globe play important roles in monsoons.
    • The dust aerosols from deserts in West China such as the Taklamakan desert and the Gobi Desert can be transported eastward to eastern China and can influence the East Asia summer monsoon.
    • And in the southwest United States, we have some small deserts that influence the North African monsoon.

    Anthropogenic contributions

    • Some studies have found that the anthropogenic aerosols emitted from the Indian subcontinent can decrease summer monsoon precipitation.
    • However, some others found that absorbing aerosols such as dust can strengthen the monsoon circulation.

    Minor components

    • Earlier it was believed that dust from deserts across the globe will have the same components.
    • But it was found that different deserts have different chemical compositions and this can influence the dust’s properties.
    • For example, dust from the Middle East has the more absorbing ability of solar radiation than dust from North Africa and this difference in absorbing ability might influence monsoon systems.

  • Satellites and Light Pollution

    Objects sent to space that orbit the Earth can increase the overall brightness of the night sky by 10 per cent above natural levels, showed a new study.

    Light Pollution

    • Light pollution is the presence of anthropogenic and artificial light in the night environment.
    • It is exacerbated by excessive, misdirected or obtrusive use of light, but even carefully used light fundamentally alters natural conditions.
    • Specific categories of light pollution include light trespass, over-illumination, glare, light clutter, and skyglow.
    • A single offending light source often falls into more than one of these categories.

    How does a satellite contribute?

    • Large fleets of communication satellites that have been unleashed in space not just add to the light pollution but also collide and form more debris.
    • Light from this piling debris cloaks astronomical bodies like ‘the glowing clouds of stars in the Milky Way’ from human sight.
    • While telescopes and sensitive cameras often resolve space objects as discrete points of light, low-resolution detectors of light such as the human eye see only the combined effect of many such objects.
    • Astronomers have complained that the growing number of artificial space objects choke the sky and disturb observations.

    Impacts of light pollution

    • As a major side-effect of urbanization, it is blamed for compromising health, disrupting ecosystems and spoiling aesthetic environments.
    • Health effects of over-illumination or improper spectral composition of light may include increased headache, worker fatigue, medically defined stress and an increase in anxiety.
    • Likewise, animal models have been studied demonstrating unavoidable light to produce adverse effect on mood and anxiety.
    • For those who need to be awake at night, the light at night also has an acute effect on alertness and mood.

  • Places in news: Chenab Arch Bridge

    A half-a-kilometre long arch, the defining feature of the world’s highest railway bridge over river Chenab, is set to be completed today.

    Chenab Arch Bridge

    • The bridge is part of an ambitious 272-km rail link project and is being constructed by the Northern Railway at an estimated cost of ₹28,000 crores.
    • The bridge will be able to withstand earthquakes with a magnitude of up to eight and high-intensity blasts.
    • The bridge, which will include a 14-metre dual carriageway and a 1.2-metre-wide central verge, will have a design speed of around 100 kilometres per hour with a lifespan of 120 years.

    Its inception

    • The preparations of the rail link began in 2002 and the initial plan was to connect Kashmir’s northernmost city Baramulla to New Delhi.
    • Work on the bridge started again in July 2017 with the aim of completing the construction by the end of 2019 but due to contractual issues in 2018, it was delayed.
    • Steel was specifically chosen for the construction of the bridge as it will make the project more economical.
    • The metal will also be able to resist temperatures of minus 20 degree Celsius and wind speeds of above 200 kilometres per hour.

    Significance

    • A railway bridge like this, with this kind of geography, has not been made anywhere in the world, according to the Railways.
    • It will symbolise the Kashmir rail link, to be ready for at least a century.
    • In other words, a train from Kanyakumari can reach all the way to Kashmir uninterrupted.
    • The cable crane that will do the job of completing the arch itself measures around 900 meters and is said to be the longest in the world, made especially for this project.

  • Net-zero emissions target is unjust for developing countries

    The article explains why the net-zero emission targets are unjust for developing countries like India.

    Understanding climate justice

    • The principles of equity and common but differentiated responsibilities and respective capabilities (CBDR-RC) based on historical responsibility have been the bedrock of climate actions under the UNFCCC ever since 1992.
    • Based on these principles in Paris Agreement, developed countries promised to deliver higher finance commitment by 2025 and a more facilitative technology regime, apart from leading mitigation actions.
    • Developing countries agreed to take legal obligation that entails undertaking domestic mitigation measures and reporting on their implementation as part of their Nationally Determined Contributions (NDC).
    • These are also the central pillars on which India’s call for climate justice is premised.

    How India is leading by example

    • Indian government introduced climate sensitivity in domestic policies.
    • Climate sensitivity is reflected in interventions like energy for all, housing for all, health insurance and crop insurance, action like the “Clean India” and “give it up” campaigns, popularising yoga and sustainable lifestyle practices.
    • Together, these initiatives ensure climate justice to the vulnerable and poor sections that are worst hit by climate change.
    • While the rich were cajoled to move towards sustainable living, the poor were provided with the safety nets to fight climate change.

    Addressig 3 aspects of climate justice

    • In Nicomachean Ethics, Aristotle distinguished three forms of justice, namely distributive, commutative and corrective. 
    • With the onset of the implementation phase of the Paris Agreement, it would be useful to take stock of how well the global community is addressing these three aspects of justice.

    1) Distributive justice

    • Distributive justice pertains to how resources should be distributed in terms of principles of equality, equity and merit.
    • For climate change, the most important resource is the global carbon space.
    • The developed countries continue to corner a lion’s share of the carbon space for their luxurious consumption while they goad developing countries to cut their emissions emanating from even basic needs.
    • Therefore, the focus should be on ensuring ambitious climate action by developed countries in the near-term to ensure distributive climate justice.

    2) Commutative justice

    • In the climate change discourse, commutative justice refers to the honouring of past commitments in good faith.
    • The Kyoto Protocol adopted in 1997 was a historic turning point with legally binding targets for industrialised countries to reduce overall GHG emissions.
    • However, the second commitment period of the Kyoto Protocol that commits developed country parties to reduce greenhouse gas emissions by at least 18 per cent below 1990 levels by the year 2020 only entered into force in December 2020, just one day before its expiry.
    • These targets unambitious and grossly inadequate to meet the principal objective of UNFCCC.
    • Also, several developed countries backtracked and refused to take on any targets in the second commitment period.
    • The developed country delivery of finance, technology transfer, and capacity building support to developing countries is also not up to the mark.
    • The fulfilment of these past commitments would be a critical precursor to any enhancement of climate ambition by developing countries.

    3) Corrective justice

    • Corrective justice pertains to the righting of wrongs.
    • Climate justice demands that every individual who is born on this earth has a right to development and dignified living.
    • For this, developed countries need to repay the climate debt by shouldering greater mitigation responsibilities and providing finance, technology and capacity-building support.

    Consider the question “Why net zero emission targets are considered to be unjust for developing countries?”

    Conclusion

    So, while many herald the call for net zero by 2050 as a positive signal in avoiding runaway climate breakdown, in reality it delays climate action by developed countries and is being used to evade historical responsibility and transfer burdens to developing countries.

  • Species in news: Nacaduba sinhala ramaswamii Sadasivan

    The discovery of the species Nacaduba sinhala ramaswamii Sadasivan in the Agasthyamalais in the Western Ghats a decade ago has now found a place in the Journal of Threatened Taxa.

    William Shakespeare’s words hold true! Really “Whats in a name!”

    Nacaduba sinhala ramaswamii Sadasivan

    • The new taxon of Lycaenid butterflies belonging to the Nacaduba genus had been first sighted by a team of Bombay Natural History Society.
    • Line Blues are small butterflies belonging to the subfamily Lycaenidae and their distribution ranges from India and Sri Lanka to the whole of southeastern Asia, Australia and Samoa.
    • It is the first time that a butterfly species was discovered by an all-Indian research team from the Western Ghats.

    Try this PYQ from CSP 2020:

    Q.With reference to India’s Biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are

    (a) Birds

    (b) Primates

    (c) Reptiles

    (d) Amphibians

  • Sabarmati Riverfront Development Project

    The Ahmedabad Municipal Corporation, in its draft budget for 2021-22, has set aside Rs 1050 crore for the Sabarmati River Front Development phase 2, work on which is to begin soon.

    Rs 1050 crore fund! See how rich even the Municipal Corporations in India are!

    Sabarmati Riverfront Development Project

    • The SRDP is an environmental improvement, social uplift and urban rejuvenation project that will renew Ahmedabad.
    • The project is being developed by the Sabarmati Riverfront Development Corporation Ltd. (SRFDCL), a company wholly owned by the Ahmedabad Municipal Corporation.
    • The project will reclaim approximately 200 hectares of land from the riverbed.
    • To reclaim the land, protect low lying developments from floods, and prevent erosion of the river banks, retaining walls have been built on both sides of the river.
    • Since Sabarmati is a seasonal river, water is channelled into the river from the Narmada canal, which intersects the river upstream from Ahmedabad and is retained in the river using the Vasna Barrage which is located downstream.

    Significance of the project

    • The reclaimed land will make Ahmadabad’s riverfront, a public asset.
    • The project will provide Ahmedabad with 11.5 km long pedestrian promenades at the water’s edge along both the banks of the river.
    • In addition, many new public facilities will be built on the reclaimed land: cultural centres, museums, sports facilities, trade fair grounds and open-air markets.
    • A small portion of the reclaimed land will be sold for private commercial and residential developments.
    • The project has won Prime Minister’s National Award for Excellence in Urban Planning and Design in the year of 2003.

    Also, revise the concept of Water Divide from your NCERTS or refer to this link: https://www.ncert.nic.in/ncerts/l/iess103.pdf

    Back2Basics: Sabarmati River

    • Sabarmati is one of the major west-flowing rivers in India. Being a rain-fed river it runs dry most of the year.
    • It originates in the Aravalli Range of the Udaipur District of Rajasthan and meets the Gulf of Khambhat of the Arabian Sea after travelling 371 km in a south-westerly direction across Rajasthan and Gujarat.
    • 48 km of the river length is in Rajasthan, while 323 km is in Gujarat.
    • There are several reservoirs on Sabarmati and its tributaries. The Dharoi dam is located on the main river. Hathmati dam, Harnav dam and Guhai dam are located on the tributaries.

  • Places in news: Chilika Lake

    The Chilika Lake in Odisha, Asia’s largest brackish water lake, was once part of the Bay of Bengal, a study by the marine archaeology department of the National Institute of Oceanography (NIO), Goa, has found.

    Try this PYQ:

    Q.Consider the following statements:

    1. In India, the Himalayas are spread over five States only.
    2. Western Ghats are spread over five States only.
    3. Pulicat Lake is spread over two States only.

    Which of the statements given above is/are correct?

    (a) 1 and 2 only

    (b) 3 only

    (c) 2 and 3 only

    (d) 1 and 3 only

    Chilika Lake

    • Chilika Lake is a brackish water lagoon, spread over the Puri, Khurda and Ganjam districts of Odisha.
    • It is located at the mouth of the Daya River, flowing into the Bay of Bengal, covering an area of over 1,100 km2.
    • It is the largest coastal lagoon in India and the largest brackish water lagoon in the world after The New Caledonian barrier reef.
    • It has been listed Ramsar Site as well as a tentative UNESCO World Heritage site.

    Its formation

    • The process of the formation of the Chilika might have begun in the latter part of the Pleistocene epoch, around 20,000 years ago.
    • India’s peninsular river Mahanadi carried a heavy load of silt and dumped part of it at its delta.
    • As the sediment-laden river met the Bay of Bengal, sand bars were formed near its mouth.
    • These created a backflow of the seawater into the sluggish fresh water at the estuary, resulting in the huge brackish water lake.
    • Marine archaeological studies on the Odisha coast clearly show that the Chilika once acted as a safe harbour for cargo ships bound for Southeast Asia and other parts of the world.

    Historical accounts on Chilika

    The lake has been a useful centre for maritime activities since the third millennium before the Common Era (CE).

    • Greek geographer Claudius Ptolemy (150 CE) described Palur as an important port of Kalinga and referred to it as ‘Paloura’.
    • This port was situated close to the ‘point of departure’ located outside the southern tip of the lake at Kantiagarh, from where ships used to sail directly for Southeast Asia.
    • Stone anchors and hero stones from Manikapatna, Palur and the adjoining onshore regions of the Chilika suggest that the present brackish water lagoon was in fact a part of the Bay of Bengal.
    • Chinese pilgrim Xuanzang (7th century CE) recorded ‘Che-li-ta-lo-Ching’ as a flourishing port.
    • This port was located at Chhatargarh on the banks of the Chilika.
    • The Brahmanda Purana (10th century CE approximately) says the Chilika was an important centre of trade and commerce, with ships sailing to Java, Malaya and Ceylon.
    • The famous Sanskrit poet Kalidas called the king of Kalinga ‘Madhodhipati’ or ‘Lord of the Ocean’.

  • What to consider before India takes ‘net-zero’ pledge

    There are several issues with the adoption of net zero-emission targets. One of the most important being the lack of equity. This article deals with this issue.

    About net-zero emission targets

    • The “net zero” idea is inspired by an IPCC report that calls for global net emissions – GHG emissions minus removal of GHGs through various means to reach zero by mid-century.
    • This builds on a clause in the Paris Climate Agreement, calling for a balance between sources and sinks of emissions by the second half of the century.
    • It is worth underscoring that none of this implies that each country has to reach net-zero by 2050.
    • Net-zero announcements signals a progressive direction of travel and has the apparent merit of presenting a simple and singular benchmark for assessing the performance of a country.

    3 Issues with net zero targets

    • First, it potentially allows countries to keep emitting today while relying on yet-to-be-developed and costly technologies to absorb emissions tomorrow.
    • Second, its focus on long-term targets displaces attention from meaningful short-term actions that are credible and accountable.
    • Third., it calls into question concerns of equity and fairness.

    Balancing the concerns of developing and developed countries

    • The Paris Agreement, while urging global peaking as soon as possible, explicitly recognises that peaking will take longer for developing countries.
    • The Paris Agreement calls for achieving balance in developing and developed nation “on the basis of equity” and in the context of “sustainable development and efforts to eradicate poverty”.
    • Therefore, the Paris Agreement does not advocate uptake of net-zero targets across developed and developing countries, as currently being advocated by many countries.
    • Rather, the emphasis in the agreement on equity, sustainable development and poverty eradication suggests a thoughtful balancing of responsibilities between developed and developing countries.

    Factors India should consider before taking zero-emission target

    • Our first nationally determined contribution (NDC) submitted under the Paris Agreement has been rated by observers as compatible with a 2 degrees Celsius trajectory.
    • We are ahead of schedule in meeting our contribution.
    • Now, India will need to decide whether to join a growing number of countries (over 120 at last count) that have pledged to reach “net zero” emissions by 2050.
    • But it is not clear that enhancing mitigation action can definitively deliver net-zero emissions by 2050, given that our emissions are still rising, and our development needs are considerable.
    • There is a possibility that a not fully thought-through mid-century net-zero target would compromise sustainable development.
    • Moreover, such a major shift in our negotiating position will have implications for the future, including our ability to leverage additional finance and technology to help shift to low-carbon development pathways.
    • Our 2 degrees Celsius compatible NDC, bolstered by the Prime Minister’s announcement in 2019 that we would achieve 450 GW of renewables by 2030, could be strengthened.
    • Building on this track record suggests an alternate and equally, if not more, compelling, way to indicate climate ambition in the future than uncritically taking on a net-zero target.

    Way forward

    • We would benefit from taking stock of our actions and focusing on near-term transitions.
    • This will allow us to meet and even over-comply with our 2030 target while also ensuring concomitant developmental benefits, such as developing a vibrant renewable industry.
    • We can start putting in place the policies and institutions necessary to move us in the right direction for the longer-term and also better understand the implications of net-zero scenarios before making a net-zero pledge.
    • It would also be in India’s interest to link any future pledge to the achievement of near-term action by industrialised countries.
    • That would be fair and consistent with the principles of the UNFCCC.

    Consider the question “Growing number of countries have been setting net-zero emission target. In light of this, examine the issues India should consider before setting itself the net zero emission targets.”

    Conclusion

    India, like others, have a responsibility to the international community, we also have a responsibility to our citizens to be deliberate and thoughtful about a decision as consequential as India’s climate pledge.