How do religious beliefs help in the conservation of biodiversity?

2

(a)

Why are grains and vegetables produced in organic farms supposed to be better for human consumption than those produced in farms where chemical fertilizers, pesticides etc. has been used?

2

(a)

Why is organic farming considered more eco –friendly than agro-chemical farming?

2

(a)

There are reports that the size of Arctic ice cap is decreasing every year.
a) What are its possible reasons?
b) How we the human beings are responsible to a greater extent for this?
c) How we can contribute to check this trend?

2

(a)

In a survey it is observed that the population of fish-eating birds living on the bank of lake is continuously declining, where DDT is regularly sprayed to check mosquitoes.
i) What could be the reason behind this?
ii) Name the phenomenon involved.

2

(a)

What in your opinion is more polluted and why – Domestic sewage or ndustrial effluents/waste from a agricultural field containing fertilizes and pesticides?

2

(a)

Why was Eichhornia introduced into India? What is the consequence of its introduction?

2

(a)

List some of the waste which is generated at home. Which of them can you avoid or reduce easily?

2

(a)

Suppose your father is planning to set up a factory.
(i) What measures would you suggest to him to provide protection against noise pollution.
(ii) Mention two harmful effects of noise pollution

2

(a)

Is global warming real, only a theory or speculation?

2

(a)