GS Notes

Environment Notes 20

15 min read

Environmental Impact Assessment (EIA)

Environmental Impact Assessment (EIA) is a formal process used to predict the environmental consequences (positive or negative) of a plan, policy, program, or project prior to the decision to move forward with the proposed action. As articulated by the International Association for Impact Assessment (IAIA), EIA is “the process of identifying, predicting, evaluating and mitigating the biophysical, social, and other relevant effects of development proposals prior to major decisions being taken and commitments made.”

  • Core Purpose and Benefits:

    • Predictive Tool: It serves as a proactive tool for environmental management by forecasting potential impacts. For instance, an EIA for a proposed dam on a river would analyze impacts on downstream hydrology, aquatic biodiversity, and local community displacement.
    • Comparative Analysis: It systematically compares alternatives. A proposal for a thermal power plant might have alternatives like a different location, a different cooling technology (e.g., dry vs. wet cooling towers), or even an alternative energy source like solar, evaluating each for its environmental and economic viability.
    • Mitigation and Management: It helps in formulating an Environmental Management Plan (EMP) to mitigate adverse effects. For a mining project, an EMP would detail plans for topsoil management, overburden disposal, and post-mining land reclamation.
    • Stakeholder Engagement: It provides a structured platform for involving affected communities and other stakeholders, thereby upholding principles of environmental justice and preventing future conflicts. The public hearing process, though often contentious, is a cornerstone of this engagement.
    • Resource Optimisation: By identifying potential environmental costs early, EIA can lead to more efficient project design and resource use, ultimately reducing long-term costs associated with environmental degradation and remediation.

  • Underlying Principles:

    • Participation: Involving all relevant stakeholders, especially the local communities who are most affected. The landmark Niyamgiri mining case in Odisha, where the Dongria Kondh tribe’s consent was sought (and denied) following a Supreme Court order (2013), exemplifies the significance of this principle.
    • Transparency: All assessment-related documents and decisions should be open and accessible to the public. This principle is often operationalized through the Right to Information Act, 2005.
    • Accountability: The project proponent and the decision-making authority are responsible for the impacts of the project. This includes ensuring compliance with the conditions laid down in the Environmental Clearance (EC).
    • Integrated Assessment: The assessment must consider not only direct environmental impacts but also social, economic, cultural, and health impacts in an integrated manner.

  • The EIA Process in India: The process is a structured, multi-stage procedure:

    1. Project Proposal & Screening: The proponent submits a detailed project proposal. The Screening committee then determines if the project falls under Category A (national appraisal) or Category B (state appraisal) as per the EIA Notification, 2006. For example, large thermal power plants (>500 MW) are typically Category A.
    2. Scoping: The Expert Appraisal Committee (EAC) or State EAC (SEAC) determines the detailed scope of the EIA study, known as the Terms of Reference (ToR). This step defines the key impacts to be studied, preventing the collection of irrelevant data.
    3. Impact Analysis & Mitigation: This is the core technical phase where data is collected and impacts are predicted using various models. Mitigation measures are then proposed to minimize adverse impacts.
    4. Reporting (EIA Report): A comprehensive EIA report is prepared, including the Environmental Management Plan (EMP).
    5. Review and Public Hearing: The report is reviewed by experts and made available to the public. A public hearing is conducted by the State Pollution Control Board to record the views and concerns of the local affected people.
    6. Appraisal & Decision Making: The EAC/SEAC appraises the final EIA report and the public hearing outcomes, and makes a recommendation to the Ministry of Environment, Forest and Climate Change (MoEFCC) or the State Environment Impact Assessment Authority (SEIAA) for grant or rejection of Environmental Clearance.
    7. Post-Clearance Monitoring: After the project is commissioned, the proponent must submit regular compliance reports to the regional office of the MoEFCC to ensure that environmental safeguards are being implemented.

  • Historical Evolution in India:

    • The genesis of EIA in India can be traced to a 1976-77 Planning Commission directive asking the Department of Science and Technology to scrutinize river valley projects. Initially, this was an administrative measure without legislative backing.
    • The Bhopal Gas Tragedy (1984) was a critical turning point, highlighting the need for robust environmental regulations.
    • This led to the enactment of the Environment (Protection) Act, 1986 (EPA), an umbrella legislation for environmental protection.
    • Using the powers conferred by Section 3 of the EPA, the first EIA Notification was issued in 1994, making Environmental Clearance (EC) a mandatory legal requirement for a list of specified projects.
    • This was superseded by the EIA Notification of 2006, which decentralized the process by introducing State-level authorities (SEIAA and SEAC) and categorizing projects (A, B1, B2) based on their potential impact.
    • A controversial Draft EIA Notification was proposed in 2020, which faced widespread criticism for provisions like institutionalizing post-facto clearance (legalizing projects that started without clearance) and reducing the time for public consultation.

Environmental Ethics

Environmental ethics is a branch of philosophy that studies the moral relationship of human beings to, and also the value and moral status of, the environment and its non-human contents.

  • Anthropocentrism (Human-centered): This worldview, deeply rooted in Western thought (e.g., Judeo-Christian traditions), posits that human beings are the central or most significant entities in the world. Nature is valued primarily for its utility to humans (instrumental value).
  • Non-Anthropocentrism: This is a broad category of worldviews that challenge the anthropocentric position.
    • Psychocentrism: Argues that beings with mental capacities (consciousness, sentience) have higher moral value. While it extends moral consideration beyond humans to many animals, it may still exclude plants and non-sentient organisms.
    • Biocentrism (Life-centered): This perspective extends inherent value to all living things. Philosopher Paul W. Taylor in his work “Respect for Nature” (1986) argued that every living organism is a “teleological-center-of-life” pursuing its own good, and thus possesses inherent worth.
  • Deep Ecology vs. Shallow Ecology: These terms were coined by Norwegian philosopher Arne Næss in 1973.
    • Shallow Ecology: An anthropocentric approach where the environment is preserved solely for human benefit (e.g., conserving a forest to ensure a sustainable supply of timber and clean water for a nearby city).
    • Deep Ecology: An ecocentric viewpoint that advocates for a radical shift in human consciousness. It argues that ecosystems and all living beings have an intrinsic value, independent of their usefulness to humans. It calls for reducing human population and consumption to allow the non-human world to flourish.
  • Social Ecology: Developed primarily by Murray Bookchin in the 1960s, this school of thought links ecological problems directly to social problems. Bookchin argued that environmental destruction stems from hierarchical and exploitative social structures (like capitalism and patriarchy). The solution to the ecological crisis, therefore, lies in creating a more egalitarian, decentralized, and cooperative society.

Evolution

Evolution is the process of change in the heritable characteristics of biological populations over successive generations.

  • Darwin’s Theory: Charles Darwin’s seminal work, On the Origin of Species (1859), proposed the theory of evolution by natural selection. Its core tenets are that organisms produce more offspring than can survive, there is variation within populations, some of these variations are heritable, and individuals with advantageous traits are more likely to survive and reproduce, passing those traits to the next generation.
  • Geological Time Scale and Key Events:
    • Pre-Cambrian Eon (c. 4.6 bya - 541 mya): This period covers almost 90% of Earth’s history.
      • Life began with the Last Universal Common Ancestor (LUCA), a prokaryotic organism.
      • The evolution of photosynthesis in Cyanobacteria (Blue-Green Algae) led to the Great Oxidation Event (c. 2.4 bya), which fundamentally changed the atmosphere and paved the way for aerobic respiration.
      • The first eukaryotes (complex cells with a nucleus) and multicellular organisms like sponges, and later cnidarians (jellyfish, corals), emerged.
    • Paleozoic Era (541-252 mya):
      • Ordovician Period: Marked by the diversification of marine life. The first vertebrates (jawless proto-fish) appeared. This period ended with the first mass extinction, likely caused by global cooling and glaciation.
      • Silurian Period: A crucial period for terrestrial life. The evolution of vascular tissues (xylem and phloem) and lignin allowed plants to grow taller and colonize land, starting with simple forms like cooksonia.
      • Devonian Period (“Age of Fishes”): Saw a great diversification of fish, including cartilaginous (sharks) and bony fish. Amphibians, the first four-limbed vertebrates (tetrapods), evolved from lobe-finned fishes to exploit terrestrial environments. The period ended with the second mass extinction, affecting marine life severely.
      • Carboniferous Period: Extensive forests of giant ferns and clubmosses dominated the landscape, their remains forming the coal deposits we use today. Reptiles evolved, with a key innovation: the amniotic egg, which allowed them to reproduce away from water.
      • Permian Period: The supercontinent Pangaea formed. The era ended with the Permian-Triassic extinction event (“The Great Dying”), the third and most severe mass extinction, wiping out over 90% of marine species and 70% of terrestrial vertebrate species, likely due to massive volcanic eruptions (Siberian Traps) causing runaway climate change.
    • Mesozoic Era (“Age of Reptiles”) (252-66 mya):
      • Triassic Period: Following the Great Dying, ecosystems slowly recovered. The first dinosaurs and early mammals evolved. The period ended with the fourth mass extinction, which eliminated many large amphibians and reptiles, allowing dinosaurs to become dominant.
      • Jurassic-Cretaceous Periods: Dinosaurs dominated terrestrial ecosystems. Angiosperms (flowering plants) appeared and diversified, co-evolving with insects. The era ended with the Cretaceous-Paleogene extinction event, the fifth mass extinction, which wiped out the non-avian dinosaurs. This was caused by the impact of a large asteroid in the Yucatán Peninsula (Chicxulub crater) and associated volcanic activity.
    • Cenozoic Era (“Age of Mammals”) (66 mya - present):
      • With the dinosaurs gone, mammals diversified to fill ecological niches.
      • Apes evolved, and from one lineage, hominins emerged. Key characteristics of human evolution include bipedalism (walking upright), a significant increase in brain size, the development of complex tool-making, and the evolution of language and culture, allowing for the cumulative transmission of knowledge.

Wildlife: Key Species

  • Sarus Crane (Antigone antigone):
    • The world’s tallest flying bird. It is the official state bird of Uttar Pradesh.
    • Habitat: Primarily wetlands, marshes, and agricultural fields.
    • Status: Listed as Vulnerable on the IUCN Red List. Threats include habitat loss due to wetland drainage for agriculture, pollution, and collision with power lines. It is protected under Schedule IV of the Wildlife (Protection) Act, 1972.
  • Sea Turtles in India:
    • India’s waters host five species: Olive Ridley, Green, Hawksbill, Loggerhead, and Leatherback.
    • Olive Ridley Turtle (Lepidochelys olivacea): Famous for its synchronized mass nesting phenomenon called Arribada. Major nesting sites in India are on the Odisha coast, including Gahirmatha Marine Sanctuary, Rushikulya, and Devi River mouth. IUCN Status: Vulnerable.
    • Leatherback Turtle (Dermochelys coriacea): The largest sea turtle. IUCN Status: Vulnerable. Nests in the Andaman and Nicobar Islands.
    • Conservation Initiatives:
      • Operation Oliva: A coast guard operation to protect Olive Ridley turtles during their nesting season in Odisha.
      • Operation Save Kurma: A species-specific operation on turtles, coordinated by the Wildlife Crime Control Bureau (WCCB).
  • Crocodiles in India:
    • Gharial (Gavialis gangeticus): A fish-eating crocodile with a distinctive long, thin snout. Found primarily in the clear rivers of the Gangetic basin, with its main population in the Chambal River. IUCN Status: Critically Endangered.
    • Mugger Crocodile (Crocodylus palustris): A freshwater crocodile found in marshes, lakes, and rivers throughout the Indian subcontinent. IUCN Status: Vulnerable.
    • Saltwater Crocodile (Crocodylus porosus): The largest living reptile. Found in coastal areas, estuaries, and mangrove swamps of eastern India (Bhitarkanika National Park, Sundarbans) and the Andaman & Nicobar Islands. IUCN Status: Least Concern.
  • Gangetic River Dolphin (Platanista gangetica):
    • India’s National Aquatic Animal. It is a freshwater dolphin found in the Ganges-Brahmaputra-Meghna river system in India, Nepal, and Bangladesh.
    • It is practically blind and uses echolocation to navigate and hunt. Locally known as ‘Susu’.
    • IUCN Status: Endangered. Threats include dam construction, pollution, and accidental entanglement in fishing nets. Vikramshila Gangetic Dolphin Sanctuary in Bihar is a protected area for them.
  • Vultures in India:
    • India has 9 species of vultures. They are vital scavengers.
    • Their populations crashed by over 95% in the 1990s due to the veterinary drug Diclofenac, which causes renal failure in vultures that feed on carcasses of treated cattle.
    • Critically Endangered Species:
      1. White-backed Vulture (Gyps bengalensis)
      2. Slender-billed Vulture (Gyps tenuirostris)
      3. Long-billed Vulture (Indian Vulture) (Gyps indicus)
      4. Red-headed Vulture (Sarcogyps calvus)
    • Conservation: The “Action Plan for Vulture Conservation 2020-2025” has been launched. “Vulture Safe Zones” are being created where the use of Diclofenac and other harmful NSAIDs (like Ketoprofen) is minimized.
  • Mahseer:
    • A large freshwater fish, often called the “Tiger of the Water”.
    • Golden Mahseer (Tor putitora): Found in Himalayan rivers. IUCN Status: Endangered.
    • Hump-backed Mahseer (Tor remadevii): Found exclusively in the Cauvery river basin. IUCN Status: Critically Endangered.

Prelims Pointers

  • EIA in India is legally backed by the Environment (Protection) Act, 1986.
  • The first EIA notification was issued in 1994, later replaced by the EIA Notification, 2006.
  • Category A projects under EIA 2006 require appraisal at the National Level (MoEFCC).
  • Category B projects are appraised at the State Level (SEIAA). Category B is further divided into B1 (EIA mandatory) and B2 (EIA not mandatory).
  • Deep Ecology was a term coined by Norwegian philosopher Arne Næss. It assigns intrinsic value to all living beings.
  • Social Ecology links environmental issues to social hierarchies, a concept developed by Murray Bookchin.
  • The First Mass Extinction occurred at the end of the Ordovician period.
  • Land plants first appeared during the Silurian period.
  • Amphibians evolved during the Devonian period.
  • Reptiles evolved during the Carboniferous period.
  • The largest mass extinction, “The Great Dying,” occurred at the end of the Permian period.
  • The extinction of dinosaurs occurred at the end of the Cretaceous period (Fifth Mass Extinction).
  • Sarus Crane: State bird of Uttar Pradesh; IUCN Status - Vulnerable.
  • Olive Ridley Turtles: Known for mass nesting called Arribada; IUCN Status - Vulnerable.
  • Operation Oliva is conducted by the Indian Coast Guard for the protection of Olive Ridley Turtles.
  • Gharial: Found in Chambal River; IUCN Status - Critically Endangered.
  • Mugger Crocodile: Freshwater crocodile; IUCN Status - Vulnerable.
  • Saltwater Crocodile: IUCN Status - Least Concern.
  • Gangetic River Dolphin: National Aquatic Animal of India; IUCN Status - Endangered.
  • The veterinary drug responsible for the decline of vulture populations is Diclofenac.
  • Critically Endangered vultures in India include: White-backed, Slender-billed, Long-billed, and Red-headed vultures.
  • Golden Mahseer: IUCN Status - Endangered.
  • Hump-backed Mahseer: Found in the Cauvery River; IUCN Status - Critically Endangered.

Mains Insights

  • EIA: A Tool for Sustainable Development or a Procedural Hurdle?
    • Cause-Effect: The stringent implementation of EIA can lead to more environmentally sustainable projects and prevent ecological disasters. However, procedural delays, corruption, and poor-quality reports often dilute its effectiveness, turning it into a mere formality. This can cause project cost overruns and foster a negative perception among investors.
    • Debate: The core debate revolves around “Environment vs. Development.” Proponents of stronger EIA argue it’s essential for upholding the Precautionary Principle and ensuring inter-generational equity. Critics argue that the current process is cumbersome and non-transparent, hindering economic growth. The Draft EIA 2020 amplified this debate by proposing to legitimize projects that violate the law (post-facto clearance), which critics argue undermines the very purpose of EIA.
    • Way Forward: Reforms should focus on enhancing the capacity of appraisal committees, making the process more transparent through digital platforms, ensuring meaningful public participation instead of tokenism, and imposing strong penalties for non-compliance.
  • Environmental Ethics in Policy Making
    • Shift in Paradigm: Indian environmental jurisprudence has shown a gradual shift from a purely anthropocentric to a more ecocentric approach. The Supreme Court’s judgments in cases like M.C. Mehta vs. Union of India have established principles like “Polluter Pays” and the “Precautionary Principle.”
    • Rights of Nature: The decision by the Uttarakhand High Court (2017) to grant legal personality to the Ganga and Yamuna rivers was a landmark move towards recognizing the intrinsic rights of nature, an idea rooted in Deep Ecology. Although later stayed by the Supreme Court on practical grounds, it ignited a significant debate on the legal framework for environmental protection.
    • Relevance for GS-IV (Ethics): These ethical frameworks help in resolving ethical dilemmas in environmental governance. For example, when deciding on a development project in a forested area, an administrator must weigh the anthropocentric benefits (jobs, energy) against the biocentric/ecocentric values (loss of biodiversity, rights of indigenous communities whose culture is tied to the forest).
  • The Anthropocene and the Sixth Mass Extinction
    • Context: While the Earth has witnessed five natural mass extinctions, scientists argue we are now in the midst of a sixth mass extinction, driven by human activities (the Anthropocene). The current rate of species extinction is estimated to be 100 to 1,000 times higher than the natural background rate.
    • Causal Factors: The primary drivers are habitat destruction (deforestation, urbanization), climate change, pollution (plastics, chemicals), overexploitation of resources (overfishing, poaching), and the spread of invasive species.
    • Implications: This has profound implications for ecosystem stability, food security, and human well-being. The loss of biodiversity weakens the resilience of ecosystems to environmental shocks and disrupts critical services like pollination and water purification. This is a crucial analytical point for GS-I (Geography) and GS-III (Environment & Biodiversity).
  • Challenges in Wildlife Conservation in India
    • Human-Wildlife Conflict: As human populations expand and encroach upon natural habitats, conflicts with wildlife (e.g., elephants raiding crops, leopard attacks near urban fringes) are increasing. This poses a major challenge to conservation efforts and requires integrated landscape-level management strategies rather than just focusing on protected areas.
    • Funding and Focus: Conservation efforts are often skewed towards charismatic megafauna like tigers and elephants (“species-centric approach”), while lesser-known species and habitats (like grasslands and wetlands) receive less attention and funding.
    • Community Participation: The success of conservation depends heavily on the support of local communities. Models like Joint Forest Management (JFM) and community reserves are steps in the right direction, but their implementation is often weak. Empowering communities and ensuring they receive tangible benefits from conservation is critical for long-term success.

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