Subject(s): Ecosystems -- Economic Development -- Inter-linkage between ecology and economics -- World economic development and limitations, New eco-principles -- Biosphere and the ecosystems -- Biotic environment, abiotic environment, Inorganic substances, Organic substance, Climate condition and limiting factors, Soil, Energetic of ecosystem, biodiversity, Ecological regions of an economy -- Energy flow in the ecosystem: Solar energy flow, Energy flow along food chain, Solar energy flow and ecological economics -- Bio-gas chemical cycles -- Bio-geo-chemical cycles, Hydrological cycle, gaseous cycle, Carbon cycle, Nitrogen cycle, Oxygen cycle, Sedimentary cycles, Phosphorus cycle, Sulphur cycle,Nutrient budget and ecosystem, Nutrient cycles and human well being -- Population ecology an human population growth -- Population of species and human system, Biotic population growth pattern, Human population growth, population density, migration and trade, density and use of manmade capital and technology, Liberalization, Population and environment, India's human settlement -- Human ecology: limits of sources and sinks -- Food security, land use, land degradation, Soil erosion, Chemical degradation, physical degradation, unsustainable agricultural practices -- Water resource balance, water pollution, development and water management -- Forest resources, deforestation and degradation -- Biodiversity , Energy- development and energy security, energy and environmental pollution, India's energy scene and sustainability -- Non-energy materials , Sink and wastes , pesticides, Global pollution, ozone depletion, Global warming, degradation of Sink , desertification -- Sustainability of economic development