What percentage of the total land area in our country is covered by forests (in $\%$)?

In a village in Karnataka,people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their fields in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for the excessive growth of plants and the death of fish in the lake.

What is meant by 'biodiversity hotspots'?

Select the incorrect statement.

Which of the following is a fast-growing tree?

How many wildlife sanctuaries are there in India?