Waste water released from homes and industries is called
sewage
garbage
bore hole
sullage
Which rays enter into earth, if ozone layer is destructed
UV rays
Gamma rays
Infrared rays
Beta rays
Mosquitoes breed is stagnant water and cause
Fever
Cough
Sneezing
Malaria
Process of waste water treatment is known as
Sullage
Garbage treatment
drainage treatment
Sewage treatment
Air contains ___ % of oxygen.
20.9%
0. 3%
78%
20%
The colourless gas found in the upper atmosphere.
oxygen
nitrogen
ozone
carbon dioxide
CFC destroys ______ layer of earth.
Ozone
Troposphere
Stratosphere
Thermosphere
Prevention and control of pollution Act for Air was established in _________ year.
1974
1982
1981
1980
Industrialization and _______ increases global warming.
rural area
urbanization
pollution
farming
_______ decrease the productivity of the soil.
Grass
Garbage
Factory waste
Fertilizers