Incomplete burning of petrol or diesel in vehicles creates .......... gas which is very poisonous. </h2>&…

Elements can be diagonsed by</h2></div>

Maximum ozone depletion is caused by</h2></div>

_____ shields the surface of the earth from ultraviolet (UV) radiation from the sun.</h2></div>

Ultraviolet light causes</h2></div>

BOD level in fresh water should not exceed beyond</h2></div>

Producer gas is formed by passing over hot biomass.</h2></div>

What happens in the tertiary treatment for water pollution?