Thermal pollution reduces amount of _________ gas in water.
O2
CO2
N2
CO
Carbon dioxide and _________ are the green house gases.
Oxygen
Nitrogen
Carbon monoxide
Methane
Most of the environmental problems are due to increase of
Water
Animals
Rain
Population
Expand the term CFC
Chloro Fluro Carbon
Chlorine fluoride Carbon
Chloride fluorine carbon
Chloro fluoride carboxide
The colourless gas found in the upper atmosphere.
oxygen
nitrogen
ozone
carbon dioxide
Process of waste water treatment is known as
Sullage
Garbage treatment
drainage treatment
Sewage treatment
Much damage to soil is caused by _______ than pollution.
Farming
Garbage
construction projects
Erosion
Industrialization and _______ increases global warming.
rural area
urbanization
pollution
farming
Air contains ___ % of oxygen.
20.9%
0. 3%
78%
20%
Waste water released from homes and industries is called
sewage
garbage
bore hole
sullage