What is the farming called in which there is less use of chemicals and lesser production of waste?

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

Organic farming does not employ<br> </h2></div>

Which of the following industries are responsible for water pollution?<br> </h2></div>

Which method is most effective in controlling floods?</h2></div>

Ozonosphere occurs at height of</h2></div>

World ozone day is celebrated on __________</h2></div>

List any four factors which determine the amount of dissolved oxygen in water. Explain in brief the harmful effects of n…