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

The ozone layer: Between 15 and 50 km above the earth is a thin layer of gas called 'ozone'. It protec…

Which of the following can be created using crop waste?

BOD of two samples of water A and B were 120 mg/l and 400 mg/l respectively. Which sample is more polluted.</h2>&l…

Organic farming is raising crops through use of</h2></div>

Given is a representation of a type of pollution. Study the picture and answer the question.<br> State on…

What is the importance of forest as a resource?</h2></div>

Ozone is present as a chief constituent in which region of the atmosphere?<br> </h2></div>