Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised.
In the context of conservation of natural resources, explain the terms reduce, recycle and reuse. From among the materials that we use in daily life, identify two materials for each category.
(a) Locate and name the water reservoirs in Figures (a) and (b).
(b) Which has an advantage over the other and why?
Suggest a few measures for controlling carbon dioxide levels in the atmosphere.
Although coal and petroleum are produced by degradatioin of bio- mass, yet we need to conserve them. Why?
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field 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 excessive growth of plants and death of fish in the lake.
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