Pollution of Ai...

Carbon exists in the atmosphere in the form of:

The two gases making the highest relative contribution to the greenhouse gases are:

Increased concentration of ______ in the air is believed to cause global warming.

The greenhouse effect is caused by:
i) Accumulation of $O_{2}$ in the atmosphere
ii) Depletion of $O_{3}$ layer
iii) Accumulation of $CO_{2}$ in the atmosphere

A pond contains clean water. Which of the following activities will produce least pollution of water?

Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in July every year. The occasion is called ______________.

The phenomenon of marble cancer is due to:

Which of the following is not a green house gas?

Boojho wishes to contribute to reducing air pollution. Which vehicle should be used for going to school?

John finds that, as he blows air into a balloon, it becomes bigger. What inference can John make?