Long Answer TypeWhy does ozone hole form over Antarctica? How will enhanced ultraviolet radiations affect us?
Short Answer TypeSince October 02, 2014 'Swachh Bharat Abhiyan' has been launched in our country.
(a) Write your views on this initiative giving justification.
(b) As a biologist name two problems that you may face while implementing the programme in your locality.
(c) Suggest two remedial methods to overcome these problems.
How have human activities caused desertification? Explain.
Human activities like over- cultivation, unrestricted grazing, deforestation and poor irrigation practices, resulting in arid patches of land. The open lands without any cover of vegetation is prone to soil erosion. The soil erodes and becomes incapable of providing nutrition to the plants. The land become barren over the years These large barren patches extend and meet over time to create a desert.Rapid urbanisation has led to the desertification.
By the end of 2002 the public transport of Delhi switched over to a new fuel. Name the fuel. Why is this fuel considered better? Explain.
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