Biology [1 Mark Question Answer]

Farmers are trying to reduce the pollution problem caused by the runoff or animals waste from pastures. Factories cool the water used to cool machinery and it instead of releasing it into a river.

Warm water is released by a factory into a nearby river or pond raises the temperature of the water, sometimes enough to harm the living things there.

Disease causing organism, pesticides and fertilizers, industrial chemicals, metals, radioactive, waste, petroleum products.

Industrial effluents, mining wastes, sewage disposal and domestic wastes, agricultural wastes.

Water pollution is the introduction into fresh or ocean waters of chemical, physical, or biological material that degrades the quality of the water and affects the organisms living in it.

Major Pollutants of air are: Sulphur dioxide, nitrogen oxides, carbon dioxide, fly ash and suspended particulate matter (SPM).

Acid rain is the term for pollution caused by sulphur and nitrogen dioxide when they combine with atmospheric moisture.

Soil pollution usually results from the disposal of solid and semi-solid wastes in agricultural practices, industrial processes and insanitary habits.

Pollution is the addition of any such constituent to air, water or land which deteriorates the natural quality of the environment.

Parthenon of Athens, Taj Mahal of Agra, Parliament building of Ottawa.

Increased

Chloroflurocarbons/CFCs

Carbon monoxide

3

Ozone

Genetic

Smog

Green house effect

Nitrifying bacteria

Rhizobium

Azotobacter

Soil

Anabaena

DDT

Urea, Ammonium Sulphate

Soil pollution

CNG

Chemicals, Smokes and Exhaust, Heat Pollution.

Carbon dioxide, Methane, Nitrogen oxide

Sunn hemp

Chlorofluorocarbons (CFCs)

Denitrifying bacteria

Lichens

Soil pollution

Mercury

Carbon monoxide

Plastic

80 Decibel (dB)

Carbon monoxide

In cities, about 80% of the total air pollution is caused by automobiles (vehicles). Hence, to control air pollution, it is mandatory to take a pollution certificate for the vehicles from the traffic police.

Some solid particles (pollutants) are also present in the smoke. Hence, to remove these solid pollutants from smoke, it is advised to use electrostatic precipitators in the chimneys.

The CFCs cause damage to the ozone layer which protects us from the harmful effects of ultraviolet rays present in sunlight. Hence, its use is banned in some countries.

The process of breaking down of proteins into ammonia is called Ammonification.

The unit to measure sound is called decibel.

Any organic material of plant or animal source which when added to soil improves its quality to raise better crops is called manure.

The micro organisms which when added to the soil increase the fertility of the soil, are termed as Bio-fertilizer.