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Environmental Issues

Multiple Choice Questions

121.

The true statement about 'green-house effect' is that it is caused by :

CO₂ only
SO₂ only
CO₂ and SO₂
CO₂, CFC, CH₄ and NO₂ gases

122.

Soil carried by gravity is

alluvial
eolian
colluvial
glacial

123.

Which of the following is not a Green-house gas?

N₂O
CFC
O₃
CO₂

124.

Freon gas causing stratospheric O₃ depletion is mainly released from

refrigerator
automobile
thermal power plant
steel industry

125.

Which of the following diseases is related to cadmium pollution?

Minamata
Pneumoconiosis
Anaemia
Itai- Itai

126.

Nutrient enrichment of a lake will cause

eutrophication
stratification
biomagnification
bioaccumulation

Short Answer Type

127.

What is bioaccumulation?

Multiple Choice Questions

128.
SO₂ pollution is indicated by

Desmodium (grasses)

Sphagnum (mosses)

Usnea (lichens)

Cucurbita (climbers)

Usnea (lichens)

Lichens are widely used as environmental indicators or bio-indicators. Lichens are injured by sulphur dioxide (SO2). Lichens have also shown sensitivity to some other pollutants, such as heavy metals and Other Gaseous Toxics in Air , but for the most part lichen damage can be attributed to SO2.