MEDIUM
Earn 100

Smoke and fog combine together to form .

50% studentsanswered this correctly
Important Questions on Pollution of Air and Water

HARD

MEDIUM
(Global warming/Pollution)

EASY

EASY

HARD

EASY
Choose the appropriate word and fill in the blank.
When harmful substances enter the environment, they _____ (pollute, save) it.

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HARD



EASY

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MEDIUM

EASY

EASY


EASY

HARD

EASY
Dirty air can make us fall sick. We must try to keep the air clean. Put a cross against the pictures which makes the air dirty.

