Which of the following enhances B.O.D. of water ?</h2></div>

What are the different ways in which water gets contaminated?<br> </h2></div>

Who introduced the concept of organic farming?<br> </h2></div>

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

Read the following about pollution and identify the correct matching combinations.<br> <table class="wysiw…

What is an undesired high level of sound called?

Biochemical oxygen demand measures</h2></div>

Pollutant likely to deplete ozone layer is?</h2></div>