Acid deposition Atmosphere 1 Azolla 1 Blue green algae 1 Composting 1 Fertilizers 1 Fossil fuels 1 Fuels 1 Garbage management 1 Gas kinetics 1 Green house effect 1 Green manuring 1 Nuclear chemistry 1 Ozone, stratospheric 1 Pesticides 1 Petroleum 1 Photochemistry 1 Plastics 1 Polymers 1 Salt affected soils 1 Soil classification 1 Soil erosion 1 Soil genesis 1 Thermodynamics 1 Wastelands development 1