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 does algal bloom destroy the quality of a fresh water body? Explain.
Presence of large amounts of nutrients in water causes excessive growth of planktonic (freefloating) algae, and such condition is called an algal bloom. It imparts a distinct colour to the water bodies and cause deterioration of the water quality and fish mortality. Some algal blooms are extremely toxic to human beings and animals.
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.
Switch
