Write one harmful effect of deforestation on environment.</h2></div>

Nitrogen oxides released in the stratosphere cause ozone depletion due to<span><br> </span></h2>…

Depletion of ozone layer is mainly due to</h2></div>

If a water body have high amount of DDT it's 'Biochemical Oxygen Demand' (B.O.D.) will</h2></div>

Farming without the use of chemicals as fertilizers, herbicides and pesticides is known <span>as…

Instead of fertilizers, organic farming uses<br> </h2></div>

The result of ozone hole is</h2></div>

Supersonic jets cause pollution by thinning of</h2></div>