At what height over the earth does the ozone layer exist?</h2></div>

Explain giving two reasons (b) What is organic farming? Why is it suggested to switch over to organic farming?</h2&gt…

Can reforestation take place naturally?</h2></div>

What is the reason for the reduction in dissolved oxygen?

Which harmful radiations are absorbed by ozen layer?</h2></div>

Measurement of rate of oxygen utilisation by a unit volume of water over a period of time is to measure</h2></d…

Which award is given to the individuals or communities from rural areas that have shown a significant contribution and d…

What is organic farming ?</h2></div>