D:-virus

Correct Answer:- Option-A
Question29:-Eutrophication is

A:-A process in carbon cycle

B:-A water purification technique

C:-A result of accumulation of plant nutrient in water body

D:-A improved water quality

Correct Answer:- Option-C
Question30:-Bhopal Gas Tragedy is a case of

A:-Air pollution

B:-Soil pollution

C:-Nuclear pollution

D:-Thermal pollution

Correct Answer:- Option-A
Question31:-Marine pollution is caused due to

A:-0il

B:-Plastic

C:-Chemicals

D:-All of these

Correct Answer:- Option-D
Question32:-Ozone layer absorbs

A:-Radio waves

B:-Infrared radiations

C:-Uv-Radiations

D:-Chlorine atoms

Correct Answer:- Option-C
Question33:-The Forest {Conservation) Act was enacted in the year

A:-1986

B:-1974

C:-1980

D:-1972

Correct Answer:- Option-C
Question34:-Noise is

A:-Loud sound

B:-Unwanted sound

C:-Constant sound

D:-Sound of high frequency

Correct Answer:- Option-B
Question35:-Demography is the study of

A:-Animal behaviour

B:-River

C:-Population growth

D:-None of these

Correct Answer:- Option-C
Question36:-According to WHO, Health is

A:-A stage of physical well being

B:-A stage of mental well being

C:-A stage of social well being

D:-All of these

Correct Answer:- Option-D
Question37:-Reclamation of saline-alkali soil is done by

A:-Gypsum

B:-Lime

C:-Calcium carbonate

D:-None of these

Correct Answer:- Option-A
Question38:-A legally binding intermational agreement to reduce green house gas emissions is

A:-Earth summit

B:-Kyoto protocol