Carbon dioxide is called green-house gas because it is

Industrial melanism is an example of

In the textbook you came across Three Mile Island and Chernobyl disasters associ

Question :

Algal blooms impart a distinct colour to water due to

Nuisance growth of aquatic plants and bloom-forming algae in natural waters is g

Which one of the following diseases is not due to contamination of water?

Which one of the following impurities is easiest to remove from wastewater?

Why is it necessary to remove sulphur from petroleum products?

Catalytic converters are fitted into automobiles to reduce emission of harmful g

Which of the following in sewage treatment removes suspended solids?

Shell of egg in bird becomes thin (not properly formed) due to the pollution of

Measuring Biochemical Oxygen Demand (BOD) is a method used for

Catalytic converters are fitted into automobiles to reduce emission of harmful g

Question :

The major source of noise pollution, world wide is due to

The loudness of a sound that a person can withstand without discomfort is about

The green scum seen in the fresh water bodies is

Among the following which one causes more indoor chemical pollution?

Choose the incorrect statement

The -Polyblend- is a/ an

FOAM (Friends of the Arcata Marsh) is a group of citizens responsible for the in

Natural ageing of lake by biological enrichment of its water is called

DDT causes egg shell thinning in birds because it inhibits

Concentration of DDT for first tropic level (phytoplanktons) and top trophic lev

The waste water from Industries may contain toxic heavy metals having density of

Which of the following species of plant is considered as the world-s most proble

Presence of large amount of nutrients in water also cause excess growth of plank

In B.O.D. test oxygen plays an important role to

Full form of B.O.D. is