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🌿 Environmental Studies & Ecology Notes

Ecosystems, energy flow and nutrient cycles, natural resources, biodiversity and its conservation, global environmental problems and conventions, sustainable development, EMP and risk assessment, green buildings and LCA, soil pollution, bioremediation and India's waste rules.

23 of 23 chapters written

Chapters

  1. 01Ecosystems — Definition, Structure, Function & ClassificationWhat an ecosystem is (Tansley, 1935), its scope and importance, biotic and abiotic components, producers, consumers and decomposers, functions (energy flow, nutrient cycling, productivity, succession, regulation), classification into terrestrial and aquatic types, ecotones and edge effect.Read →
  2. 02Energy Flow, Food Chains, Food Webs & Ecological PyramidsHow energy enters and moves through an ecosystem — laws of thermodynamics, the 10% law, trophic levels, grazing and detritus food chains, food webs, and pyramids of number, biomass and energy (upright and inverted) — with worked examples.Read →
  3. 03Biogeochemical CyclesHow nutrients cycle through living and non-living parts of the biosphere — gaseous and sedimentary cycles; the water, carbon, nitrogen, phosphorus, sulphur and oxygen cycles with their key processes, organisms and human impacts.Read →
  4. 04Bioaccumulation & BiomagnificationThe difference between bioaccumulation, bioconcentration and biomagnification; properties of pollutants that magnify (persistent, fat-soluble); DDT, mercury (Minamata), cadmium, PCBs and other examples; effects on top predators and humans; and control measures.Read →
  5. 05Ecosystem Value, Services & Carrying CapacityThe value of ecosystems — the four kinds of ecosystem services of the Millennium Ecosystem Assessment, economic valuation (TEEB, Costanza), carrying capacity and the logistic growth model, limiting factors, overshoot and how carrying capacity applies to human populations and planning.Read →
  6. 06Natural Resources — Classification, Land & Forest ResourcesClassification of natural resources (renewable, non-renewable, inexhaustible; biotic and abiotic; actual and potential), land as a resource — land use, degradation, soil erosion and conservation — and forest resources: uses, deforestation, its effects, and forest conservation in India.Read →
  7. 07Water Resources — Surface & Groundwater Use, Floods, Droughts & DamsGlobal and Indian water availability, use of surface and groundwater, over-exploitation and its effects, conflicts over water, floods and droughts as resource problems, the benefits and problems of big dams, and water conservation.Read →
  8. 08Mineral Resources & Environmental Effects of MiningTypes of minerals (metallic, non-metallic, fuel), India's important mineral belts, uses of minerals, the environmental and social effects of mining (land, water, air, health, displacement), case examples, and mitigation — reclamation, mine closure plans and the legal framework.Read →
  9. 09Energy Resources — Renewable, Non-renewable & Alternate SourcesConventional energy sources (coal, oil, gas, nuclear) and their environmental costs; renewable and alternate sources — solar, wind, hydro, biomass and biogas, geothermal, tidal and wave, ocean thermal, hydrogen and fuel cells — how each works, merits and limits, and India's energy mix and targets.Read →
  10. 10Biodiversity — Levels (Genetic, Species, Ecosystem) & ValueMeaning of biodiversity, its three levels, alpha, beta and gamma diversity, species richness and evenness, diversity indices, and the consumptive, productive, social, ethical, aesthetic and option values of biodiversity.Read →
  11. 11India as a Mega-diversity Nation & Biodiversity HotspotsWhy India is one of the world's 17 mega-diverse countries, its share of global species, biogeographic zones, endemism, the concept and criteria of biodiversity hotspots, and the four hotspots that include parts of India.Read →
  12. 12Threats to Biodiversity, Man–Wildlife Conflict & ConservationCauses of biodiversity loss (HIPPO — habitat loss, invasive species, pollution, population, over-exploitation, plus climate change), poaching and wildlife trade, man–wildlife conflict and its management, IUCN Red List categories, and in-situ and ex-situ conservation with Indian examples.Read →
  13. 13The Biological Diversity Act, 2002 & Access and Benefit SharingIndia's Biological Diversity Act, 2002 — its link to the Convention on Biological Diversity and the Nagoya Protocol, the three-tier structure (NBA, SBBs, BMCs), People's Biodiversity Registers, access and benefit sharing, heritage sites, and the 2023 amendment.Read →
  14. 14Ozone Depletion & Ozone-Depleting SubstancesThe stratospheric ozone layer and how it forms, Dobson units, the chemistry of ozone destruction by CFCs and halons, the Antarctic ozone hole, effects of UV-B, ozone-depleting substances and their substitutes, the Vienna Convention, Montreal Protocol and Kigali Amendment, and India's phase-out programme.Read →
  15. 15International Environmental Conventions & ProtocolsThe major global environmental agreements — Stockholm 1972, Rio 1992 and its outcomes, climate treaties (UNFCCC, Kyoto, Paris), ozone (Vienna, Montreal, Kigali), biodiversity (CBD, Cartagena, Nagoya, Kunming–Montreal), wetlands (Ramsar), wildlife trade (CITES), migratory species (CMS), chemicals and waste (Basel, Rotterdam, Stockholm, Minamata), desertification (UNCCD) — year, place and purpose.Read →
  16. 16Deforestation & DesertificationCauses and effects of deforestation in India and the world, forest cover trends, desertification and land degradation — definitions, causes, extent in India, and control measures including afforestation, the UNCCD, land degradation neutrality and India's restoration target.Read →
  17. 17Sustainable Development — Concept, Goals, Population & ConsumerismDefinition and pillars of sustainable development, strong and weak sustainability, principles (intergenerational equity, precautionary, polluter pays), the Millennium and Sustainable Development Goals, population growth and its environmental impact (I = PAT), consumerism and sustainable consumption, and India's SDG framework and Mission LiFE.Read →
  18. 18Environmental Management Plan (EMP) & Risk AssessmentContents of an Environmental Management Plan — mitigation, monitoring, institutional arrangements, budget and green belt — and environmental and industrial risk assessment: hazard identification (HAZOP, HAZAN), consequence and probability analysis, risk estimation and acceptability, and the disaster management plan required in EIA reports.Read →
  19. 19Green Building, Ecological Footprint & Life Cycle AssessmentGreen building principles and Indian rating systems (GRIHA, IGBC, LEED), the Energy Conservation Building Code, the ecological and carbon footprints and biocapacity, Earth Overshoot Day, and life cycle assessment — its stages, the ISO 14040 framework, and its use in comparing materials and products.Read →
  20. 20Environmental Education, Ethics & Human HealthAims and levels of environmental education (Tbilisi 1977, Supreme Court direction in India), environmental ethics — anthropocentric, biocentric and ecocentric views, deep ecology, land ethic, Gandhian and Indian traditions — environmental justice and movements, and the links between environment and human health: air, water and soil-borne diseases, vector-borne disease, toxic exposures and the One Health approach.Read →
  21. 21Soil Pollution — Sources, Effects & ControlWhat soil pollution is, its sources (agrochemicals, industrial and mining waste, municipal solid waste and leachate, e-waste, sewage sludge, plastics, oil), the main pollutants (heavy metals, pesticides, excess nutrients, salts), effects on soil health, food chains, groundwater and people, assessment, and control and remediation methods.Read →
  22. 22Bioremediation & PhytoremediationUse of micro-organisms and plants to clean contaminated soil and water — principles, in-situ and ex-situ techniques (bioventing, biosparging, bioaugmentation, biostimulation, landfarming, composting, biopiles, bioreactors), phytoremediation mechanisms, factors affecting performance, advantages and limitations, and Indian applications such as oil-zapper bacteria.Read →
  23. 23Solid, Biomedical, Hazardous & Other Waste Rules in IndiaKey provisions of India's waste rules under the Environment (Protection) Act — Solid Waste Management Rules 2016, Bio-Medical Waste Management Rules 2016 (colour coding), Hazardous and Other Wastes Rules 2016, Plastic Waste Management Rules (with single-use plastic ban and EPR), E-Waste Rules 2022, Construction & Demolition Waste Rules, and Battery Waste Rules 2022.Read →

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