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Subject: Environment

  • Asian Waterbird Census (AWC) 2021

    The two-day Asian Waterbird Census-2020 was recently held in Andhra Pradesh.

    Anyone can participate!

    By using eBird and filling an additional site form, one can take part in this multi-country effort to document the state of our wetlands and waterbirds.  To take part one simply visits a wetland and count the birds he/she see there.

    Asian Waterbird Census

    • The Asian Waterbird Census (AWC) takes place every January.
    • The AWC was started in 1987, and many birders were initiated into bird counting and monitoring through this project.
    • This citizen-science event is a part of the global International Waterbird Census (IWC) that supports the conservation and management of wetlands and waterbirds worldwide.
    • The data collected each year is shared by Wetlands International with global conservation organisations such as IUCN and Ramsar Convention.

    Why need such census?

    • Waterbirds are one of the key indicators of wetlands health.
    • Wetlands provide feeding, resting, roosting and foraging habitats for these charismatic species.

    AWC in India

    • In India, the AWC is annually coordinated by the Bombay Natural history Society (BNHS) and Wetlands International.
    • BNHS is a non-government Organisation (NGO) founded in the year 1883.
    • It engages itself in the conservation of nature and natural resources and also in the research and conservation of endangered species.
    • Its mission is to conserve nature, primarily biological diversity through action based on research, education and public awareness.

    Back2Basics: Waterbirds

    • The term water bird, alternatively waterbird or aquatic bird is used to refer to birds that live on or around water.
    • In some definitions, the term is especially applied to birds in freshwater habitats, though others make no distinction from birds that inhabit marine environments.
    • Also, some water birds are more terrestrial or aquatic than others, and their adaptations will vary depending on their environment.
    • These adaptations include webbed feet, bills, and legs adapted to feed in the water, and the ability to dive from the surface or the air to catch prey in water.

  • Tide–Rainfall Flood Quotient

    To understand if a coastal city is more prone to floods caused by tidal events or extreme rainfall, a team from the IIT Bombay devised a new metric or measure called the Tide–Rainfall Flood Quotient.

    Try this PYQ:

    The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?

    (a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out

    (b) The mangroves provide both food and medicines which people are in need of after any natural disaster

    (c) The mangrove trees are tall with dense canopies and serve as art excellent shelter during a cyclone or tsunami

    (d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots

    Tide–Rainfall Flood Quotient

    • Using the past rainfall data, tidal data, and topography of the region one can apply this framework to pinpoint the major factor at play.
    • This quotient helps understand the main driver of the flooding events for effective disaster management.
    • It considers three geographically diverse flood-prone coastal regions – Mithi Catchment in Mumbai, , Jagatsinghpur District in Odisha, and Greater Chennai to test their new metric.
    • The new method helped classify these regions into ‘storm-tide dominated’ or ‘pluvial (rainfall) dominated’ regions.
    • In Mithi, they found a devastating impact of storm-tide reaching even up to a distance of 7 km from the coastal boundary.
    • It concluded that Mithi catchment was ‘storm-tide dominated’, while Jagatsinghpur and Chennai were ‘pluvial dominated’

    A tool for flood management

    • This metric can help disaster management experts in framing better flood risk management systems directed towards long term planning.
    • For storm-tide dominated regions, severe flood hazard can be alleviated by building coastal defence structures such as closure dams, tide breakers, and storm-surge barriers at appropriate locations.
    • The tide and surge forecasting systems in these regions should be equipped with state-of-the-art ocean circulation models.
    • On the other hand, for pluvial dominated regions, structural measures such as rainwater storage structures, lakes, and detention basins should be prioritized in the flood management plans.

  • Places in news: Deepor Beel

    Assam has prohibited community fishing at Deepor Beel, a wetland on the south-western edge of Guwahati and it’s the only Ramsar site.

    Try this PYQ:

    In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

    (a) Biosphere reserves

    (b) National parks

    (c) Wetlands declared under Ramsar convention

    (d) Wildlife sanctuaries

    Deepor Beel

    • Deepor Beel is located to the south-west of Guwahati city, in Kamrup district of Assam, India.
    • It is a permanent freshwater lake, in a former channel of the Brahmaputra River, to the south of the main river.
    • It is a wetland under the Ramsar Convention which has listed since November 2002, for undertaking conservation measures on the basis of its biological and environmental importance.
    • Considered as one of the largest beels in the Brahmaputra valley of Lower Assam, it is categorised as a representative of the wetland type under the Burma monsoon forest biogeographic region.
    • It is also an important bird sanctuary habituating many migrant species.
    • Freshwater fish is a vital protein and source of income for these communities; the health of these people is stated to be directly dependent on the health of this wetland ecosystem.

    Back2Basics: Ramsar Convention

    • The Convention on Wetlands of International Importance (better known as the Ramsar Convention) is an international agreement promoting the conservation and wise use of wetlands.
    • It is the only global treaty to focus on a single ecosystem.
    • The convention was adopted in the Iranian city of Ramsar in 1971 and came into force in 1975.
    • Traditionally viewed as a wasteland or breeding ground of disease, wetlands actually provide fresh water and food and serve as nature’s shock absorber.
    • Wetlands, critical for biodiversity, are disappearing rapidly, with recent estimates showing that 64% or more of the world’s wetlands have vanished since 1900.
    • Major changes in land use for agriculture and grazing, water diversion for dams and canals and infrastructure development are considered to be some of the main causes of loss and degradation of wetlands.

  • Why Geo-engineering is still a dangerous, techno-utopian dream?

    Geoengineering has steadily shifted over the last few decades from the margins towards the mainstream of climate action discourse.

    Q.What do you mean by Geoengineering? What are its practical applications? Also, discuss its limitations. (250W)

    What is Geoengineering?

    • Climate engineering aka geoengineering is the deliberate and large-scale intervention in the Earth’s climate system, usually with the aim of mitigating the adverse effects of global warming.
    • It is a deliberate, large-scale intervention carried out in the Earth’s natural systems to reverse the impacts of climate change.
    • Its techniques fall primarily under three categories: Solar radiation management (SRM), carbon dioxide removal (CDR), and weather modification.
    • Solar radiation management refers to offsetting the warming effect of greenhouse gases by reflecting more solar radiation (sunlight) back into space.
    • Carbon dioxide removal refers to removing carbon dioxide gas (CO2) from the atmosphere and sequestering it for long periods of time.

    Debates around geoengineering have burrowed to the deepest roots of our conflict with nature — do we have the right to manage and manipulate nature?

    What are the specificities of geoengineering?

    Specific technologies include-

    • Solar geoengineering or ‘dimming the sun’ by spraying sulfates into the air to reflect sunlight back into space;
    • Ocean fertilization or the dumping of iron or urea to stimulate phytoplankton growth to absorb more carbon;
    • Cloud brightening or spraying saltwater to make clouds more reflective and more.

    CDR technologies being proposed as a means to achieve ‘net zero’ emissions by mid-century involve deliberate intervention in the natural carbon cycle:

    • Carbon capture and storage (CCS), direct air capture (DAC) and
    • Bioenergy with carbon capture and storage (BECCS)

    India and Geo-engineering

    • We had experiments such as LOHAFEX (an ocean iron fertilization experiment to see if iron can cause algal bloom and trap carbon dioxide from the atmosphere).
    • LOHAFEX was an ocean iron fertilization experiment jointly planned by the Council of Scientific and Industrial Research (CSIR) in India and the Helmholtz Foundation in Germany.
    • The purpose of the experiment was to see if the iron would cause an algal bloom and trap carbon dioxide from the atmosphere.

    How well did it fetch?

    • As expected iron fertilization led to the development of bloom during LOHAFEX, but the chlorophyll increase within the fertilized patch, an indicator of biomass, was smaller than in previous experiments.
    • The algal bloom also stimulated the growth of zooplankton that feed on them. The zooplanktons in turn are consumed by higher organisms.
    • Thus, ocean fertilization with iron also contributes to the carbon-fixing marine biomass of fish species that have been removed from the ocean by over-fishing.

    The debate over its advocacy

    • Mainstream activists are advocating solar geoengineering as a means to buy “humanity more time to cut greenhouse gas emissions”.
    • Opponents have numerous foundationally solid arguments. They warn against “taking our ecosystems even further away from self-regulation”.
    • They argue that such actions distract attention from the need for deep cuts to gross emissions which is achievable with the right political will and resource mobilization.

    Undesired consequences of geoengineering

    • Conducting tests for geoengineering is a fallacy since these methods need to be deployed at a scale large enough to impact the global climate system to be certain of their efficacy.
    • It is a large risk to take without knowing the potentially harmful consequences of such a planetary scale deployment.
    • Some of these consequences are already known. Solar geoengineering, for example, alters rainfall patterns that can disrupt agriculture and water supplies.
    • Injecting sulfate aerosols in the stratosphere above the Arctic to mimic volcano clouds, for example, can disrupt the monsoons in Asia and increase droughts.

    Geopolitical concerns

    • Manipulating the climate could have the same geopolitical function as nuclear weapons.
    • Even before geoengineering is deployed, it may be used as a threat that will likely incite countermeasures.
    • Say if governments ever gain control of changing the course of potentially damaging storms, diversions that direct storms toward other countries may be seen as acts of war.

    What lies ahead?

    • We all know that climate change is growing more rapidly than anticipated earlier.
    • Hence we should combine it with a program of deep decarbonization. This would help implement a “clean-up process” that will hasten our return to a more habitable environment.
    • Scientists agree that natural climate solutions such as forest sinks cannot be relied upon for the scale of mitigation needed.
    • Therefore, a socially just application of such technologies for carbon capture with geological sequestration offers ‘negative emissions’.

    Conclusion

    • Geoengineering cannot be treated as a magical mechanism to escape the heightening concentrations of greenhouse gases (GHGs) while accepting the viewpoint that rapid decarbonization is impossible.
    • It also cannot be treated as a license to continue emitting more GHGs with no changes to current consumption and production patterns.
    • Specific technologies that can help us achieve negative emissions need to be publicly funded and democratically administered to ensure that they serve the public interest.
    • And they can only act as a supplement to scaling back of GHG emissions in all sectors, not a substitute.

  • Places in news: Dibru-Saikhowa National Park

    PC: Gmaps

    Assam has asked the State’s Forest and Revenue departments to permanently rehabilitate the indigenous forest dwellers of the Dibru-Saikhowa National Park.

    Try this PYQ from CSP 2019:

    Q. Which of the following are in Agasthyamalai Biosphere Reserve?

    (a) Neyyar, Peppara and Shendurney Wildlife Sanctuaries; and Kalakad Mundanthurai Tiger Reserve

    (b) Mudumalai, Sathyamangalam and Wayanad Wildlife Sanctuaries; and Silent Valley National Park

    (c) Kaundinya, Gundla Brahme-swaram and Papikonda Wildlife Sanctuaries; and Mukurthi National Park

    (d) Kawal and Sri Venkateswara Wildlife Sanctuaries; and Nagarjunasagar-Srisailam Tiger Reserve

    Dibru-Saikhowa National Park

    • DSNP is a national park in Assam located in Dibrugarh and Tinsukia districts.
    • It was designated a Biosphere Reserve in July 1997 with an area of 765 sq. km.
    • The park is bounded by the Brahmaputra and Lohit Rivers in the north and the Dibru river in the south.
    • It mainly consists of moist mixed semi-evergreen forests, moist mixed deciduous forests, canebrakes, and grasslands.
    • It is the largest Salix swamp forest in north-eastern India, with a tropical monsoon climate with a hot and wet summer and cool and usually dry winter.

     Why in news?

    • Rehabilitation of some 10,000 people has been hanging fire since 1999 when the Dibru-Saikhowa Wildlife Sanctuary was upgraded to a national park.
    • The park, home to a few wild horses, had been in focus since May when a blowout at an Oil India Limited gas well in the vicinity posed an ecological threat.

    What is the issue?

    • The affected people belong to the Missing community.
    • The forest dwellers of the 425-sq. km. Dibru-Saikhowa National Park has been denied access to government schemes since 1986 through a notification.
    • It allowed them to continue staying until their shifting to a suitable place.
    • The organization said the villagers’ problems started when 765 sq. km. around their habitations was declared a biosphere reserve in 1997, limiting the access of the forest to the community.
    • The hardship compounded in 1999 when the national park came into existence.

  • The climate policy needs new ideas

    The article highlights the issues with the current climate policies which are centred on the inequality.

    Inequality and climate change

    • Inequity is built into the climate treaty, which considers total emissions, size, and population, making India the fourth largest emitter.
    • According to the United Nations, the richest 1% of the global population emits more than two times the emissions of the bottom 50%.
    • .China, with four times the population of the U.S., accounts for 12% of cumulative emissions.
    • India, with a population close to that of China’s, for just 3% of cumulative emissions that lead to global warming.
    • In an urbanized world, two-thirds of emissions arise from the demand of the middle class for infrastructure, mobility, buildings, and diet.
    • Well-being in the urbanized world is reflected in saturation levels of infrastructure.
    • Growth in the developed countries is consumption-driven not production driven.
    • The vaguely worded ‘carbon neutrality’, balancing emitting carbon with absorbing carbon from the atmosphere in forests is a triple whammy for latecomers like India.
    • Such countries already have less energy-intensive pathways that will not encroach on others’ ecological space, a young population, and are growing fast to reach comparable levels of well-being with those already urbanized and in the middle class.

    What changes are required in the policies

    • At present, the focus is on physical quantities which indicates effects on nature.
    • The solutions require analysis of drivers, trends, and patterns of resource use. 
    • This anomaly explains why the link between well-being, energy use, and emissions is not on the global agenda.
    • Modifying unsustainable patterns of natural resource use and ensuring comparable levels of well-being are societal transformations.
    • New thinking must enable politics to acknowledge transformational social goals and the material boundaries of economic activity.

    India’s unique national circumstances

    • India must highlight its unique national circumstances.
    • For example, the meat industry, especially beef, contributes to one-third of global emissions.
    • Indians eat just 4 kg of meat a year compared to those in the European Union who eat about 65 kg.
    • Also to be noted is the fact that the average American household wastes nearly one-third of its food.
    • Transport emissions account for a quarter of global emissions.
    • Transport emissions are the symbol of Western civilization and are not on the global agenda.
    • Rising Asia uses three-quarters of coal drives industry and supports the renewable energy push into cities.
    • India, with abundant reserves and per capita electricity use that is one-tenth that of the U.S., is under pressure to stop using coal.

    Way forward

    • India has the credibility and legitimacy to push an alternate 2050 goal for countries currently with per capita emissions below the global average.
    • These goals should include well-being within ecological limits, the frame of the Sustainable Development Goals, as well as multilateral technological knowledge cooperation around electric vehicles, energy efficiency, building insulation, and a less wasteful diet.

    Conclusion

    Emissions are the symptom, not the cause of the problem. India, in the UN Security Council, must push new ideas based on its civilizational and long-standing alternate values for the transition to sustainability.

  • Places in news: Sea of Galilee

    The Sea of Galilee, well-known in Jewish, Christian, and Islamic lore, has swelled up due to recent rains, according to reports in the Israeli media.

    Do you know?

    The Sea of Galilee Lake Tiberias, Kinneret or Kinnereth is a freshwater lake in Israel. It is the lowest freshwater lake on Earth and the second-lowest lake in the world (after the Dead Sea, a saltwater lake).

    Sea of Galilee

    • The lake lies in northern Israel, between the occupied Golan Heights and the Galilee region. It is fed by underground springs but its major source is the Jordan River.
    • The lake has risen to 209.905 meters below sea level due to heavy rainfall in the surrounding areas.
    • The Jordan flows into the lake and then exits it before ending in the Dead Sea, the saltiest and the lowest point on the planet.
    • Water is not extracted from the Sea of Galilee. But it is considered to be an important barometer of the water situation in Israel.

  • [pib] International Blue Flag hoisted at 8 beaches across the Country

    The Environment Minister has virtually hoisted the international blue flags in 8 beaches across the country.

    Try this PYQ:

    Q. At one of the places in India, if you stand on the seashore and watch the sea, you will find that the seawater recedes from the shoreline a few kilometers and comes back to the shore, twice a day, and you can actually walk on the seafloor when the water recedes. This unique phenomenon is seen at:

    (a) Bhavnagar

    (b) Bheemunipatnam

    (c) Chandipur

    (d) Nagapattinam

    About Blue Flag Certification

    • This Certification is accorded by an international agency “Foundation for Environment Education, Denmark” based on 33 stringent criteria in four major heads i.e.
    1. Environmental Education and Information,
    2. Bathing Water Quality,
    3. Environment Management and Conservation and
    4. Safety and Services on the beaches.
    • It started in France in 1985 and has been implemented in Europe since 1987, and in areas outside Europe since 2001 when South Africa joined.
    • Japan and South Korea are the only countries in South and southeastern Asia to have Blue Flag beaches.
    • Spain tops the list with 566 such beaches; Greece and France follow with 515 and 395, respectively.

    Which are the 8 beaches?

    The beaches where the International Blue Flags were hoisted are:

    1. Kappad (Kerala)
    2. Shivrajpur (Gujarat)
    3. Ghoghla (Diu)
    4. Kasarkod and
    5. Padubidri (Karnataka)
    6. Rushikonda (Andhra Pradesh)
    7. Golden (Odisha) and
    8. Radhanagar (Andaman & Nicobar Islands)

  • Species in news: Wild Sun Rose (Portulaca Laljii)

    Botanists have discovered a new species of wild Sun Rose from the Eastern Ghats in India.

    Try this PYQ from CSP 2018:

    Q.Why is a plant called Prosopis juliflora often mentioned in the news?

    (a) Its extract is widely used in cosmetics.

    (b) It tends to reduce the biodiversity in the area in which it grows

    (c) Its extract is used in the pesticides.

    (d) None of the above

    Portulaca Laljii

    • The new species named Portulaca laljii was discovered from the Prakasam district of Andhra Pradesh.
    • It has unique features such as a tuberous root, no hair in its leaf axils, a reddish-pink flower, prolate-shaped fruits, and copper brown seeds without luster.
    • Portulaca Laljii has been named to honor the contribution of Lal Ji Singh, an eminent botanist of the Botanical Survey of India.
    • The species has been placed under the ‘Data Deficient’ category of the IUCN List of Threatened Species because very little information is available about the population of the species.

    Morphological features

    • These morphological features distinguish the species from other species of the genus Portulaca.
    • The flowers, which are reddish-pink in color, are very minute, at about 0.5mm.
    • The plant was found growing in rocky crevices at an altitude of about 1,800 meters above mean sea level, very close to the ground, at about less than 10 cm.
    • The plants belonging genus Portulaca are classified in the category Sun Rose because they flower in bright sunshine.
    • The genus was described by Linnaeus in 1753 as a type genus of the flowering plant family Portulacaceae.

  • [pib] Tso Kar Wetland Complex

    India has added Tso Kar Wetland Complex in Ladakh as its 42nd Ramsar site, which is a second one in the Union Territory (UT) of Ladakh. With this, India now has forty-two Ramsar sites.

    Try this PYQ:

    In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

    (a) Biosphere reserves

    (b) National parks

    (c) Wetlands declared under Ramsar convention

    (d) Wildlife sanctuaries

    Tso Kar Wetland Complex

    • It is a high-altitude wetland complex, consisting of two principal waterbodies, Startsapuk Tso, a freshwater lake of about 438 hectares to the south, and Tso Kar itself, a hypersaline lake of 1800 hectares to the north.
    • It is situated in the Changthang region of Ladakh.
    • It is called Tso Kar, meaning white lake, because of the white salt efflorescence found on the margins due to the evaporation of highly saline water.

    Ecological significance

    • Wetlands provide a wide range of important resources and ecosystem services such as food, water, fibre, groundwater recharge, water purification, flood moderation, erosion control and climate regulation.
    • They are, in fact, a major source of water and our main supply of freshwater comes from an array of wetlands which help soak rainfall and recharge groundwater.
    • The Tso Kar Basin is an A1 Category Important Bird Area (IBA) as per BirdLife International and a key staging site in the Central Asian Flyway.
    • The site is also one of the most important breeding areas of the Black-necked Crane (Grus nigricollis) in India.

    Back2Basics: Wetlands

    • A wetland is a distinct ecosystem that is flooded by water, either permanently or seasonally, where oxygen-free processes prevail.
    • The primary factor that distinguishes wetlands from other landforms or water bodies is the characteristic vegetation of aquatic plants, adapted to the unique hydric soil.
    • Wetlands provide a wide range of important resources and ecosystem services such as food, water, fibre, groundwater recharge, water purification, flood moderation, erosion control and climate regulation.

    What is the Ramsar Convention?

    • The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is a treaty for the conservation and sustainable use of such sites.
    • The convention, signed in 1971 in the Iranian city of Ramsar, is one of the oldest inter-governmental accords for preserving the ecological character of wetlands.
    • Also known as the Convention on Wetlands, it aims to develop a global network of wetlands for the conservation of biological diversity and for sustaining human life.
    • Over 170 countries are party to the Ramsar Convention and over 2,000 designated sites covering over 20 crore hectares have been recognised under it.