(i) The radio active by products cannot be disposed easily.
(ii) Improper storage of nuclear waste can cause contamination of the environment.

a) Solar cookers help to cook food.
b) For drying clothes and grains.

i) Wildlife plays an important role in balancing the environment and provides stability to different natural processes of nature.
ii) They are needed for maintaining biological diversity.
iii) They help in promoting economic activities that generates revenue through tourism.
iv) They provide substances used in both the pharmaceutical industry and traditional medicine

i) The Chipko movement was a non-violent agitation in 1973 that was aimed at protection and conservation of trees.
ii) The name of the movement ‘Chipko’ comes from the word ‘embrace’, as the villagers hugged the trees and encircled them to prevent them from being cut.
iii) The movement originated in the Chamoli district of Uttar Pradesh (now Uttarakhand).

i) Deforestation is the destruction of large area of forests.
ii) Deforestation happens for many reasons like intensive agriculture, urbanization, construction of dams, roads, buildings and industries, hydroelectric projects, forest fires, construction of mountain and forest roads.