by admin | Jun 4, 2015 | sem3
renewable and non renewable energy sources The energy resources that are replaced by natural processes are called renewable energy resources. These resources are, therefore, inexhaustible. Biomass (from plants), sunlight, streams of water, wind, tide, and draft...
by admin | Jun 4, 2015 | sem3
water logging Waterlogging occurs whenever the soil is so wet that there is insufficient oxygen in the pore space for plant roots to be able to adequately respire. Other gases detrimental to root growth, such as carbon dioxide and ethylene, also accumulate in the root...
by admin | Jun 4, 2015 | sem3
Soil pollution Soil or land pollution can be defined as the “changes in physical, chemical and biological conditions of the soil through man’s intervention/misuse of land and hence resulting in degradation in quantity and productivity of the soil. Causes of Soil...
by admin | Jun 4, 2015 | sem3
role of an individual in prevention of pollution Over population and pollution are potent ecological forces impinging upon man by affecting the quality of the environment. All efforts aimed at bringing more and more people above the poverty line actually increase the...
by admin | Jun 4, 2015 | sem3
Nuclear hazards Radionuclides are elements (uranium 235, uranium 283, thorium 232, potassium 40, radium 226, carbon 14 etc.) with unstable atomic nuclei and on decomposition release ionizing radiations in the form of alpha, beta and gamma rays. Out of the known 450...
by admin | Jun 4, 2015 | sem3
Thermal pollution Thermal pollution is the degradation of water quality by any process that increases the ambient water temperature. The increase in temperature (a) decreases the dissolved oxygen/ oxygen supply, and (b) affects ecosystem composition. Sources of...
