The greenhouse effect is caused by ...... .

Do you observe any soil pollution in your neighborhood? What efforts will you make for controlling the soil pollution?

The acceptable level of carbon monoxide gas $(CO)$ in the atmosphere in $ppm$ level is

How much carbon dioxide gas is removed from the atmosphere annually at the end of the process of photosynthesis?

For your agricultural field or garden,you have developed a compost-producing pit. Discuss the process in the light of bad odour,flies,and recycling of wastes for a good produce.

Given below are two statements :
Statement $I :$ The $pH$ of rain water is normally $\sim 5.6$.
Statement $II :$ If the $pH$ of rain water drops below $5.6,$ it is called acid rain.
In the light of the above statements,choose the correct answer from the options given below: