The gas released from vehicles exhaust are
i. carbon monoxide
ii. Sulphur dioxide
iii. Oxides of nitrogen

(a)

i and ii

(b)

i and iii

(c)

ii and iii

(d)

i, ii and iii

A renewable source of energy is

(a)

petroleum

(b)

coal

(c)

nuclear fuel

(d)

trees

An inexhaustible resources is

(a)

wind power

(b)

soil fertility

(c)

wild life

(d)

all of the above

Green house effect refers to

(a)

cooling of earth

(b)

trapping of UV rays

(c)

cultivation of plants

(d)

warming of earth

Global warming will cause

(a)

raise in level of oceans

(b)

melting of glaciers

(c)

sinking of islands

(d)

all of these