On the basis of ownership, land is classified as _____________________ and ________________________.

The major threats to the environment are:

The mass movement of rock, debris or earth down a slope is known as ______________

Soil is made up of _______________________, ________________ and ____________________ found on the earth.

Which of the following is a major factor of soil formation?

The method of covering the bare ground between plants with straw is called _________________.

Planting of rows of trees to check the wind movement is called ___________________

What percent of fresh water is fit for human use?

Untreated industrial effluents pollute the water with_________

In dry regions with high rates of evaporation ___________________ is useful.

__________________ slow the surface runoff and replenish underground water.