Pollution and Human Impact

Plants help maintain environmental health by producing oxygen, absorbing pollutants, and preventing soil erosion. The other options (pollutants, pesticides, poisonous chemicals) all contribute to environmental degradation through contamination, toxicity, and ecosystem disruption.

Environmental pollution can be reduced by planting more trees and plants.

Organic manure is a natural fertilizer derived from animal wastes or plant residues and is generally beneficial for soil health rather than a cause of serious pollution. In contrast, vehicular exhaust, chemical fertilizers, and plastic garbage are major contributors to air, water, and land pollution. Organic farming practices actually help reduce environmental degradation.

Lichens accumulate harmless minerals as well as radioactive derivatives of strontium and cesium, which are retained in high concentration. These isotopes get ingested by the animals feeding on it. When these animals are eaten by humans, it may reach at a dangerous level.

This is the correct option as oil wells are a point source of water pollution. Being a point source, it is easier to treat the pollution coming out of oil wells before their discharge into nearby water bodies.

Highly concentrated sewage contains organic matter, pathogens, and chemicals that degrade water quality, making it a pollutant. It is not a fertilizer in its raw, concentrated form.

Industrialization involves large-scale manufacturing and energy consumption, which historically and consistently leads to increased environmental pollution.

Industrial waste is a primary source of water pollution, containing heavy metals, chemicals, and other toxic substances.

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.