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GS Paper: GS3-18.Conservation, Environmental Pollution and Degradation, Environmental Impact Assessment.

  • What is Carbon Capture, Utilization and Storage (CCUS)? What is the potential role of CCUS in tackling climate change?

    CCUS refers to a suite of technologies that capture CO₂ emissions from different sources, and utilise it in industrial processes or store it underground in geological formations.

    Potential Role of CCUS in Tackling Climate Change

    Reduction of Industrial Emissions – Essential for hard-to-abate sectors (cement, steel, refineries) where alternatives are limited.

    Support for Net-Zero Goals by complementing renewables and hydrogen.

    Negative Emissions – Combining bioenergy with CCUS can generate negative emissions by removing CO₂ already in the atmosphere.

    Energy Transition Support – Allows continued use of coal, oil, and gas during transition. Eg- Retrofitting coal power plants with CCUS.

    Utilization for Economic Value – Converts CO₂ into value-added products (synthetic fuels, green chemicals, carbonated beverages).

    Mitigation of Climate Risks – keeping global warming below 1.5°C-2°C (Paris Agreement).

    Promotes Carbon Circular Economy – Eg- CO₂ mineralisation to produce green cement.

    Geological Potential in India – Studies suggest India has 400-600 Gt CO₂ storage capacity in depleted oil & gas reservoirs and saline aquifers.

    Challenges in Artificial Carbon Sinks

    High Costs and Limited Affordability – Eg- Direct Air Capture (DAC) costs around $250-$600 per tonne of CO₂ removed (IEA, 2022), while planting trees costs less than $50/tonne.

    High Energy Use and Carbon Footprint Risk – A 2021 study in Nature Energy found that DAC powered by natural gas could re-emit up to 30% of captured CO₂.

    Storage Risks – Eg- claims of leaking in Weyburn project in Canada in 2011.

    Delays in Deployment and Lack of Scale – As of 2023, all DAC facilities worldwide together remove less than 0.01% of annual global CO₂ emissions (Global CCS Institute).

    Moral Hazard: Risk of Reducing Pressure to Cut Emissions was highlighted in the UNEP Emissions Gap Report (2022), warning against “over-optimism in carbon removal pathways.”

    North-South Divide – Rich countries and large corporations dominate carbon removal tech, leaving developing nations behind in access and decision-making.

    Way Forward

    Scale up CCS and DAC technologies with funding, incentives, and carbon pricing to meet net-zero targets. (IEA, 2021)

    Include engineered carbon removal targets in Nationally Determined Contributions (NDCs). (IPCC AR6, UNFCCC COP26)

    Invest in R&D to lower DAC costs to below $100/tonne and support pilot-scale deployment.

    Combine artificial sinks with nature-based solutions like afforestation and soil carbon sequestration.

    For India, CCUS provides a pathway to decarbonization without compromising energy security.

    Disaster Management

    Disaster Management Policy

  • Seawater intrusion in the coastal aquifers is a major concern in India. What are the causes of seawater intrusion and the remedial measures to combat this hazard?

    Seawater intrusion refers to the landward movement of saline seawater into coastal freshwater aquifers. It is a growing concern along India’s 7,500 km coastline.

    Concerns Associated with Seawater Intrusion

    Loss of Potable Water – Eg – Chennai, Digha and Saurashtra face declining freshwater availability.

    Saline irrigation water damages soils and reduces crop yields.

    Alters wetland hydrology and harms mangroves and estuaries. Eg – in Sundarbans.

    Raises economic burden on households and municipalities. Eg – Chennai’s tanker dependence during summer months.

    Causes of Seawater Intrusion

    Excessive Groundwater Extraction – Over-pumping near coasts lowers freshwater pressure, drawing seawater inland.

    Urbanisation – Concretisation and wetland loss reduce aquifer replenishment. Eg- Chennai has lost 85% of its wetlands. (WWF)

    Sea-Level Rise due to Climate Change – Eg- global mean sea level rose by 0.20 m between 1901 and 2018. (IPCC)

    Sand Mining & Shoreline Alteration – weakens natural coastal barriers.

    Cyclones, and storm surges lead to seawater infiltration in shallow aquifers.

    Coastal areas with sandy soils, porous rocks, or low-lying physiographic depressions allow rapid seawater percolation.

    Absence of systematic groundwater management and poor infrastructure regarding artificial recharge

    Dams and upstream diversions reduce the freshwater outflow that naturally counters seawater intrusion. Eg – Narmada estuary showing increased salinity.

    Remedial measures

    Artificial Recharge – Use percolation ponds, recharge shafts, injection wells, and subsurface dykes

    Regulation of Groundwater Extraction – Introduce withdrawal caps, borewell licensing, coastal aquifer zoning

    Adopt low-water crops and saline-resistant varieties to reduce irrigation stress on aquifers. Eg – ICAR-CSSRI (2022) developed salt-tolerant rice

    Rainwater harvesting to reduce dependency on shallow wells (NCCR, 2023). Eg- Chennai

    Mangrove afforestation for reducing wave energy and preventing soil erosion.

    Ecosystem-based coastal protection– Eg- Oyster beds along the coast can serve as natural breakwaters.

    Mitigating seawater intrusion is essential to safeguard coastal aquifers and advance SDG 6 and SDG 13

  • World Day to Combat Desertification and Drought 2026

    Why in the news?

    The World Day to Combat Desertification and Drought (17 June) was celebrated across 813 project areas under the WDC–PMKSY 2.0 (Watershed Development Component of Pradhan Mantri Krishi Sinchayee Yojana 2.0).

    WDC–PMKSY 2.0

    • Implemented by the Department of Land Resources (DoLR) under the Ministry of Rural Development (MoRD).
    • Focuses on:
      • Soil and water conservation.
      • Restoration of degraded lands.
      • Enhancing resilience of rainfed agriculture.
      • Sustainable watershed development.

    Major Interventions

    • Check dams, Percolation tanks, Farm ponds, Water harvesting and groundwater recharge structures

    Key Outcomes

    • Improved water availability in rainfed areas.
    • Enables second and third crop cultivation.
    • Enhances farmers’ income and livelihood security.
    • Strengthens drought resilience and climate adaptation.

    Activities Conducted

    • Bhoomi Poojan of 1,444 new watershed development works.
    • Lokarpan (Inauguration) of 8,341 completed watershed assets.
    • Plantation of 51,299 saplings under “Ek Ped Maa Ke Naam” campaign.
    • Public pledge: “For a Developed India, Let Us Build a Drought-Free India.”

    Significance

    • Promotes community-led land and water conservation.
    • Supports land restoration, water security, and climate resilience.
    • Contributes to sustainable rural development and combating desertification.

    [2016] What is/are the importance/importances of the ‘United Nations Convention to Combat Desertification’?

    1. It aims to promote effective action through innovative national programmes and supportive international partnerships.

    2. It has a special focus on South Asia and North Africa regions, and its Secretariat facilitates allocation of major portions of financial resources to these regions.

    3. It is committed to a bottom-up approach, encouraging participation of local people in combating desertification.

    A 1 only

    B 2 and 3 only

    C 1 and 3 only

    D 1, 2 and 3

  • Five solutions Indian cities need, to stop fighting for water week after week

    Why in the News?

    Major Indian cities such as Delhi, Chennai, Bengaluru and Hyderabad experienced severe water shortages in the summer of 2026. India’s urban water crises persist not because cities lack water sources, but because governance continues to prioritize creating new supplies over fixing leakages, regulating groundwater, managing demand, ensuring transparency, and reusing wastewater. The problem is not a knowledge deficit; it is an execution deficit.

    Why have seasonal water shortages evolved into a chronic urban governance crisis?

    1. Recurring Emergencies: Urban water emergencies have become a regular feature rather than an exceptional summer event
    2. Widespread Impact: Similar shortages were reported across Delhi, Chennai, Bengaluru and Hyderabad.
    3. Severe Scarcity: In parts of New Delhi, large families survived on a single 20-litre water can per day.
    4. Emergency Dependence: Delhi Jal Board deployed more than 1,000 tankers to manage shortages.
    5. Systemic Failure: Long queues, tanker dependence, anxiety and protests indicate structural weaknesses rather than temporary disruptions.
    6. Persistent Vulnerability: The same pattern repeats every year despite advance awareness of summer demand pressures.

    Why are cities becoming more water-insecure despite having access to multiple water sources?

    1. Multiple Sources: Cities obtain water from reservoirs, groundwater and interconnected supply systems.
    2. Groundwater Depletion: Urban populations extract groundwater faster than aquifers can naturally replenish.
    3. Local Buffer Erosion: Rivers, lakes and ponds that previously moderated water stress have deteriorated.
    4. Encroachment: Urban water bodies have been occupied and degraded by expanding settlements.
    5. Infrastructure Decay: Existing supply networks suffer from leakages and maintenance deficits.
    6. Demand Expansion: Rapid urbanisation has increased consumption beyond the capacity of existing systems.

    How does climate variability expose weaknesses that already exist in urban water systems?

    1. Dual Extremes: Cities increasingly experience floods and droughts within the same annual cycle.
    2. Reduced Absorptive Capacity: Encroached lakes and ponds cannot absorb excess rainfall effectively.
    3. Reduced Storage Capacity: Urban ecosystems cannot retain water for future use.
    4. Illustrative Example: Bengaluru experienced flooding after intense rains and tanker dependence a few weeks later.
    5. Infrastructure Stress: Climate shocks reveal weaknesses that already exist in water governance systems.
    6. Declining Resilience: Urban water systems have lost their capacity to absorb environmental fluctuations.

    Why does the crisis persist even when cities know what the problem is?

    1. Execution Deficit: Policymakers understand the causes of water stress but fail to implement corrective measures consistently.
    2. Maintenance Neglect: Authorities search for new sources instead of repairing existing systems.
    3. Regulatory Weakness: Groundwater extraction remains inadequately regulated and enforced.
    4. Institutional Fragmentation: Urban planning, water supply and wastewater management operate in separate administrative silos.
    5. Policy Bias: Infrastructure expansion receives greater attention than system efficiency.
    6. Short-Term Responses: Crisis management frequently substitutes for long-term planning.

    How can Indian cities shift from crisis-driven water management to long-term urban water security?

    SolutionKey Measures SuggestedProblem Addressed
    Transparent Emergency PlanningPrepare city-level water emergency plans; identify vulnerable areas; publicly disclose supply schedules, duration of shortages and distribution plans; provide regular updates.Panic, uncertainty, poor crisis management and lack of public trust.
    Recover Water Already AvailableDetect and repair leakages; conduct ward-level audits; reduce Non-Revenue Water (NRW); set targets for loss reduction.Massive distribution losses; article notes nearly 30% of water is lost before reaching consumers.
    Demand Management and ConservationConduct water audits in campuses and commercial complexes; repair internal leaks; restrict non-essential consumption during peak months; promote community-led conservation.Rising urban demand, wastage and unsustainable consumption patterns.
    Equity-Centred Emergency ResponseRegulate tanker supply and pricing; ensure minimum water access for vulnerable groups; provide temporary treatment support; spread awareness on safe storage and usage.Unequal access, exploitation during shortages and disproportionate burden on low-income households.
    Wastewater Reuse and Sewerage ReformUpgrade sewage treatment plants; improve aeration, de-weeding and desludging; reduce sewer leakages; recycle treated wastewater; support groundwater recharge.Water pollution, untreated wastewater discharge and underutilisation of recycled water.

    Is the real challenge water scarcity or the absence of transparent and accountable management?

    1. Information Deficit: Residents often receive little information regarding duration, frequency and extent of supply disruptions.
    2. Uncertainty Costs: Lack of communication increases panic, rumours and public distrust.
    3. Emergency Planning Gap: Cities lack clear and publicly available water emergency plans.
    4. Vulnerability Mapping: Authorities rarely identify the most affected neighbourhoods before crises emerge.
    5. Public Accountability: Regular public updates improve trust and strengthen compliance with conservation measures.
    6. Governance Failure: Scarcity becomes more disruptive when management systems fail to communicate and coordinate effectively.

    Why does recovering lost water offer greater returns than creating new water sources?

    1. Non-Revenue Water: Nearly 30% of water is lost before reaching consumers.
    2. Leakage Reduction: Repairing pipelines immediately increases available supply.
    3. Cost Efficiency: Water recovery is often cheaper than developing new infrastructure.
    4. Targeted Audits: Authorities can identify high-loss zones through local leak detection exercises.
    5. Virtual Source Creation: Saved water functions as a new source without requiring new extraction.
    6. Supply Reliability: Efficient distribution reduces dependence on emergency tanker operations.

    Why must urban water policy shift from supply augmentation to demand management?

    1. Large Consumers: Campuses and commercial complexes consume significant volumes of urban water.
    2. Water Audits: Internal audits can identify avoidable wastage.
    3. Basic Maintenance: Leak repairs generate substantial water savings.
    4. Consumption Norms: Cities should establish clear limits during peak-demand months.
    5. Community Participation: Resident welfare groups can promote conservation practices.
    6. Behavioural Change: Demand reduction lowers pressure on stressed water systems.
    7. Non-Essential Use Restrictions: Limiting discretionary consumption preserves supplies during emergencies.

    Why does equitable crisis management matter as much as water availability?

    1. Distributional Justice: Water shortages disproportionately affect low-income households.
    2. Tanker Regulation: Authorities must regulate tanker pricing and distribution.
    3. Basic Water Security: Emergency systems should guarantee minimum water access.
    4. Temporary Treatment Support: Areas facing contamination require interim treatment facilities.
    5. Safe Storage Communication: Public guidance reduces health risks during shortages.
    6. Equity Imperative: Urban water security depends on access as much as availability.

    Why is wastewater reuse the missing link in urban water security?

    1. Resource Recovery: Treated wastewater can augment urban water supplies.
    2. Plant Optimisation: Existing treatment plants require improved operational efficiency.
    3. Aeration Improvement: Better aeration increases treatment effectiveness.
    4. De-Weeding: Removal of excess vegetation improves plant performance.
    5. Desludging: Regular desludging enhances treatment capacity.
    6. Pollution Reduction: Improved treatment lowers contamination levels.
    7. Groundwater Recharge: Cleaner wastewater supports aquifer replenishment.
    8. Sewerage Integrity: Leak detection prevents contamination and water quality deterioration.

    Conclusion

    India’s urban water crisis reflects a governance failure more than a resource shortage. Cities already possess the technical knowledge required to address leakages, groundwater depletion, excessive demand and wastewater mismanagement. Water security requires a shift from emergency tanker-driven responses to transparent planning, institutional accountability and efficient management of existing resources.

    UPSC Relevance

    [UPSC 2023] Why is the world today confronted with a crisis of availability of and access to freshwater resources?

    Linkage: PYQ examines the structural causes behind freshwater scarcity and unequal access, which lie at the core of India’s recurring urban water crises. The article argues that urban water shortages stem not merely from inadequate water availability but from multiple reasons.

  • Giant World of Fungi Beneath Our Feet

    Why in News?

    A study published in the journal Science produced the first global map of arbuscular mycorrhizal (AM) fungi, revealing the enormous extent of underground fungal networks and their importance for climate regulation.

    Key Findings

    • Topsoils worldwide contain about 110 quadrillion km of fungal hyphae.
    • This distance is equivalent to nearly one billion trips between the Earth and the Sun.
    • AM fungal networks store around 300 million tonnes of carbon.
    • This is 4 to 6 times the weight of the entire human population.
    • The study analysed data from more than 16,000 soil cores using machine-learning techniques.

    Role in Climate Regulation

    • AM fungi form symbiotic associations with nearly 70% of all plant species.
    • They exchange Nutrients and water with plants, in return for carbon compounds produced through photosynthesis.
    • These networks sequester approximately 4 billion tonnes of CO₂-equivalent annually.
    • This equals roughly 11% of global human-related carbon emissions.

    Arbuscular Mycorrhizal (AM) Fungi

    • A group of fungi belonging to the phylum Glomeromycota.
    • They colonise plant roots and form mycorrhizae (fungus-root associations).
    • The fungal filaments, called hyphae, extend into the soil and improve nutrient uptake.

    Benefits

    • Enhance absorption of: Phosphorus, Nitrogen, Micronutrients, and Water.
    • Improve plant growth and drought tolerance.
    • Increase soil aggregation and fertility.
    • Contribute to long-term carbon storage.

    Biodiversity Hotspots Identified

    The study found that around 40% of global AM fungal networks occur in grassland ecosystems, including South Sudan, The Tibetan Plateau, and Banni Grasslands.

    Major Threats

    • Croplands contain about 50% lower fungal density compared to natural ecosystems.
    • Grasslands are being converted into agricultural land four times faster than forests.
    • This threatens underground fungal biodiversity and its ecosystem services.

    Why is the Study Important?

    • Highlights fungi as a form of “living infrastructure” supporting ecosystems.
    • Emphasises the need to include soil biodiversity and fungi in climate policy.
    • Strengthens the case for grassland conservation alongside forest protection.

    [2021] Which of the following have species that can establish symbiotic relationship with other organisms?
    1. Cnidarians
    2. Fungi
    3. Protozoa
    Select the correct answer using the code given below.

    [A] 1 and 2 only

    [B] 2 and 3 only

    [C] 1 and 3 only

    [D] 1, 2 and 3

  • Project GIB: Captive Stock Reaches 94 Birds

    Why in the news?

    Union Minister Bhupender Yadav announced that three new chicks have been added under Project Great Indian Bustard (GIB), taking the captive population to 94 birds.

    Key Highlights

    • The three chicks emerged from: 1 wild-collected egg, and 2 captive-laid eggs.
    • Total chicks hatched in the fourth year of captive breeding: 26.
    • The captive breeding population has now increased to 94 birds.
    • More chicks are expected during the current breeding season.

    About the Great Indian Bustard (GIB)

    • Scientific Name: Ardeotis nigriceps
    • One of the heaviest flying birds in the world.
    • Endemic to the Indian subcontinent.
    • State Bird of Rajasthan.
    • Habitat
      • Arid and semi-arid grasslands.
      • Open scrublands.
      • Dry agricultural landscapes.
    • Distribution: Rajasthan (largest population), Gujarat, Maharashtra, Karnataka, and Andhra Pradesh.
    • IUCN Status: Critically Endangered.
    • Protection Status: Schedule I of the Wild Life (Protection) Act, 1972.
    • Listed in Appendix I of CITES.
    • Included under Appendix I of the Convention on Migratory Species (CMS).

    [2010] With reference to India’s Desert National Park, which of the following statements are correct?

    1. It is spread over two districts.
    2. There is no human habitation inside the Park.
    3. It is one of the natural habitats of the Great Indian Bustard. Select the correct answer using the code given below:
    a) 1 and 2 only
    b) 2 and 3 only
    c) 1 and 3 only
    d) 1, 2 and 3

  • Odisha’s Groundwater Revival under ‘Jal Sanchay, Jan Bhagidari’

    Why in News?

    Odisha has emerged as a model for community-led groundwater conservation under the initiative ‘Jal Sanchay, Jan Bhagidari’, transforming monsoon rainfall into a sustainable source of groundwater recharge through rooftop rainwater harvesting and aquifer recharge structures.

    What is ‘Jal Sanchay, Jan Bhagidari’?

    • A nationwide approach promoting: Water conservation through people’s participation.
    • Based on the principle of “Whole of Government, Whole of Society.”
    • Encourages Community ownership, Scientific water management, and Rainwater harvesting.

    Objective

    • Recharge groundwater aquifers.
    • Improve water security.
    • Build resilience against future water stress.
    • Promote sustainable use of water resources.

    Odisha’s Groundwater Recharge Strategy

    • The State captures rainwater where it falls and channels it into underground aquifers through Rooftop Rainwater Harvesting
    • Rainwater collected from: Schools, Colleges, Government offices, Institutional buildings, is filtered and directed into recharge wells.
    • Recharge Structures in Water Bodies: Ponds, Tanks, Community water bodies, allowing excess monsoon runoff to percolate underground.

    CHHATA Scheme

    • Focuses on Rooftop Rainwater Harvesting Systems (RRHS).
    • Implements recharge systems in institutional buildings.

    Functions

    • Collection of rooftop runoff.
    • Filtration of rainwater.
    • Recharge of groundwater through bore wells.

    Benefits

    • Improves groundwater levels.
    • Reduces seasonal water shortages.
    • Supports urban groundwater revival.

    ARUA Scheme

    • About: Facilitates groundwater recharge through ponds and tanks.
    • Construction of Recharge Shafts.

    Functions

    • Diverts surplus surface runoff.
    • Enhances deep aquifer recharge.
    • Reduces loss of monsoon water.

    [2022] Which one of the following has been constituted under the Environment (Protection) Act, 1986?

    [A] Central water Commission

    [B] Central Ground Water Board

    [C] Central Ground Water Authority

    [D] National Water Development Agency

  • Axolotl: Mexico City’s Unofficial World Cup Mascot Facing Extinction

    Why in the news?

    Ahead of the 2026 FIFA World Cup, the axolotl has emerged as Mexico City’s unofficial mascot. However, conservationists have raised concerns that the popularity of the critically endangered amphibian has not translated into meaningful efforts to protect its rapidly disappearing habitat.

    About Axolotl

    • Common name: Axolotl
    • Scientific name: Ambystoma mexicanum
    • Group: Amphibian (salamander).
    • Endemic to: Mexico, particularly the canals of Xochimilco in Mexico City.
    • Name derived from: The Nahuatl word meaning “water monster”.

    Unique Features

    • Exhibits neoteny, retaining larval characteristics throughout its life.
    • Remains aquatic throughout its life cycle.
    • Breathes through External gills and oxygen absorption through its skin.
    • Extraordinary regenerative ability can regrow limbs, Parts of the spinal cord, Heart tissue, and Portions of the brain.

    Conservation Status

    • IUCN Red List: Critically Endangered.
    • Wild populations have witnessed a drastic decline.

    [2019] Consider the following statements:
    1. Asiatic lion is naturally found in India only.
    2. Double-humped camel is naturally found in India only.
    3. One-horned rhinoceros is naturally found in India only.
    Which of the statements given above is/are correct?

    [A] 1 only

    [B] 2 only

    [C] 1 and 3 only

    [D] 1, 2 and 3

  • Scientists Discover New Species in Angola’s Lisima Plateau

    Why in the news?

    Wildlife experts under the Wilderness Project discovered several new insect and spider species during an expedition to the Lisima Plateau in Angola.

    Newly Identified Species

    • 8 new dragonfly species.
    • 3 new grasshopper species.
    • Around:
      • 60 new butterflies and moths.

    Other Notable Discoveries

    • Armoured predatory cricket.
    • New copper caterpillar species and butterfly.
    • Fluorescent crowned crab spider.
    • Blood-orange ladybird orb-web spider.

    Fluorescent Crowned Crab Spider

    • Special Feature: Fluoresces under ultraviolet (UV) light.
    • Fluorescence may help:
      • Communication
      • Camouflage
      • Predator avoidance.

    Ladybird Orb-Web Spider

    • Feature: Mimics ladybirds using bright coloration.
    • Purpose: Warns predators about:
      • Toxicity
      • Bitter taste.
    • Example of: Mimicry in nature.

    About Lisima Plateau

    • Remote plateau region in: Angola.

    Hydrological Importance

    • Feeds four major African river systems:
      • Congo River
      • Okavango River
      • Zambezi River
      • Cuanza River.

    Global Biodiversity Context

    • Around 8.7 million species exist globally.
    • Only about: 1.5 million species are documented.
    • Extinction Concern: More than 800 animal species extinct since 1500 due to human activities.

    [2023] Consider the following statements:
    1.Some mushrooms have medicinal properties.
    2.Some mushrooms have psycho- active properties.
    3.Some mushrooms have insecticidal properties.
    4.Some mushrooms have bioluminescent properties.
    How many of the above statements are correct?

    [A] Only one

    [B] Only two

    [C] Only three

    [D] All four

  • Delhi Bird Atlas 2026

    Why in the news?

    The Delhi Bird Atlas released on 5 June 2026 documented bird distribution and abundance across Delhi for the first time and stated that Delhi ranks second among world capitals in bird diversity after Nairobi.

    Bird Diversity in Delhi

    • Total bird species recorded in Delhi: 471 species.
    • Additional: 22 species not re-recorded since 1975.
    • First-year survey findings:
      • 221 species recorded.
      • 200 species in winter.
      • 152 species in summer.

    Categories

    • 126 resident species.
    • 81 winter migrants.
    • 14 summer migrants.

    Why Delhi Has High Bird Diversity

    • Northern edge of the Aravalli Range.
    • Presence of:
      • Yamuna River floodplains.
      • Sahibi floodplains.
      • Wetlands and urban green spaces.
    • Proximity to: Western Himalayas.
    • Located near: Central Asian Flyway (CAF).

    What is the Central Asian Flyway (CAF)?

    • Major migratory bird route stretching from the Arctic region to the Indian Ocean.
    • Covers: Central Asia and South Asia.
    • Important for migratory waterbirds and shorebirds.
    • India lies at the heart of this flyway.

    [2011] The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?

    (a) It has a high rainfall that supports luxuriant vegetative growth.

    (b) It is a confluence of different biogeographical zones.

    (c) Exotic and invasive species have not been invasive species and have not been introduced in this region.

    (d) It has less human interference.