Match the items given in Column I with those in Column II and select the correct option given below: 

Column I		Column II
(a)	Eutrophication	(i)	UV-B radiation
(b)	Sanitary landfill	(ii)	Deforestation
(c)	Snow blindness	(iii)	Nutrient enrichment
(d)	Jhum cultivation	(iv)	Waste disposal

 

Options:	(a)	(b)	(c)	(d)
1.	(ii)	(i)	(iii)	(iv)
2.	(i)	(iii)	(iv)	(ii)
3.	(iii)	(iv)	(i)	(ii)
4.	(i)	(ii)	(iv)	(iii)

 

 

Biochemical Oxygen Demand (BOD) may not be a good index for pollution in water bodies receiving effluents from?

1. domestic sewage

2. dairy industry

3. petroleum industry

4. sugar industry

Which of the following is a secondary pollutant?

$1.$ $\mathrm{CO}$

$2.$ ${\mathrm{CO}}_2$

$3.$ ${\mathrm{SO}}_2$

$4.$ ${\mathrm{O}}_3$

A river with an inflow of domestic sewage rich in organic waste may result in

1. increased population of aquatic food web organisms

2. an increased production of fish due to biodegradable nutrients

3. death of fish due to lack of oxygen

4. drying of the river very soon due to algal bloom

Joint Forest Management Concept was introduced in India during
(1) 1970s

(2) 1980s

(3) 1990s

(4) 1960s

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers
(1) ozone

(2) ammonia 

(3) methane

(4) nitrous oxide