The activities of man had adverse effects on all forms of living organisms in the biosphere. Unlimited  exploitation of nature by man has disturbed the delicate ecological balance between the living and non-living components of the biosphere. The unfavourable conditions created by man himself  threatened the survival not only of himself but also of the entire living organisms on the mother earth. one of your classmates is an active member of 'Eco club' in which he is creating environmental  awareness amongst the school students, spreading the same in the society and also working hard for preventing environmental degradation of the surroundings.(a) Why is it necessary to conserve our environment ? (b) State the importance of green and blue dust-bins in the safe disposal of the household waste. (c) List two values exhibited by your classmate who is an active member of Eco-club of your school.