Pollution and Human Impact

The greenhouse effect, is a process by which thermal radiation from a planetary surface, is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface, energy is transferred to the surface and the lower atmosphere. As a result, the temperature there is higher, than it would be, if direct heating by solar radiation. were the only warming mechanism.

Water pollution is the addition of any substance to water or changing of water's physical and chemical characteristics in any way which interferes with its use for legitimate purpose. The chief source of water pollution are sewage and other waste, industrial effuents agricultural discharges and industrial wastes from chemical industries-fossil fuel plants and nuclear power plants. Sewage is the water borne waste derived from home (domestic waste) and animal or food processing plants. It includes human excreta, paper, cloth, soap, detergents etc.

Large amounts of water produced from mine drainage, mine cooling, aqueous extraction and other mining processes increases the potential for these chemicals to contaminate ground and surface water.

In point source pollution, discharges occur to a water body at a single location, such as discharges from a chemical factory, urban runoff from a roadway storm drain, or from ships, at sea. So, municipal and industrial discharge pipes, are point source pollution.

Rain water does not cause groundwater contamination. It is used to provide drinking water, water for livestock, water for irrigation or to refill aquifers in a process, called groundwater recharge.

The ozone layer  refers to the ozone within stratosphere, where over 90% of the earth's ozone resides. It is not an environmental problem. A thinning ozone layer is a environmental problem. It leads to a number of serious health risks for humans. It causes greater incidences of skin cancer and cataract of the eye.

Extrinsic factors are external causes of disease. Environmental pollutants, microbes, and drugs are all external agents that can negatively impact health.

Minamata disease is a neurological syndrome caused by severe mercury poisoning, which was famously linked to the release of methylmercury into Minamata Bay in Japan.

Soil covers a major portion of the earth's land surface. It is an important natural resource that either directly or indirectly supports most of the planet's life. Life here depends upon soil for food. Plants are rooted in soil and obtain needed nutrients from it. Animals get their nutrients from plants or from other animals that eat plants. Many animals make their homes or are sheltered in the soil. Microbes in the soil cause the breakdown and decay of dead organisms, a process that in turn adds more nutrients to the soil. It does not pollute water.

Pollution is one of the major indication if danger to the environment. In other words it is a major threat to the environment.

Acid rain makes the water and the soil acidic. Thus, causes deadening of plants and animals. It erodes sculptures, monuments and buildings.

All of the above are the reasons for water scarcity.

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As these are limited natural sources, so we would have energy crisiss by overusing it. Coal also contains Sulphur and that is responsible for acid rain. After burning, it produces CO2 which is Green house gas and causes global warming.

Ecology is the study of organisms and their environment, which includes air, water, pollution levels, and natural events.