पर्यावरणीय संरक्षण के दो उद्देश्य बताइए।

सवाना तथा टुंड्रा

Food chain and Food web

Discuss the statement that "agricultural residues and agro-industrial wastes, in fact are no waste. All of them have some use or the other and in that sense they are resources whose conventional use needs to be upgraded and better usability fully harnessed".

परजीविता एवं परभक्षण

Give the two aims of environmental conservation.

Briefly discuss the concept of the new global economic system for long term survival of the human race.