Class 4 Our Environment ppt 2( part 2)

A disease caused by polluted water.

• Malaria

• Cholera

• Dengue

• Chickenpox

Liquid waste released from our houses causes air pollution.

• False

• True

In water bodies, _________________are a threat to the life of aquatic animals.

• Soil

• Fertilizers

• Insects

• Sugar

Mixing of waste with water bodies is known as_______________ pollution.

• Land

• Air

• Water

• Noise

Accidental spillage of oil and petroleum from oil tankers pollutes sea and ocean.

• True

• False