Which one of the following is mainly responsible for depletion of ozone layer?<br> </h2></div>

Vehicular standard based on European regulation was first introduced in .......... in India.</h2></div>

Which gas is emitted by the combustion of fossil fuels?</h2></div>

High BOD values for a river means that river water</h2></div>

Crop rotation is an important part of organic farming. Why is monocropping problematic?</h2></div>

Polluting strength of sewage is characterised by its</h2></div>

Global warming is caused by greenhouse effect. Justify.<br> </h2></div>

What does CPCB stand for?