Environmental Pollution
1) Environment: Land, water, air and our surroundings make our environment.
2) Pollution: Pollution is a harmful change in our
environment.
3) The substances which
cause pollution are called pollutants.
4) There are three main type of pollution.
(1) Air Pollution (2) Land Pollution
(3) Water Pollution
5) Air pollution causes Asthma, skin and eye allergies,
headache and lung diseases.
6) Ozone layer protects earth from the sun harmful rays.
7) Air pollution is the main cause of depletion of ozone layer.
8) Bio-degradable
Materials: Those materials
which degraded by nature. Example of Bio-degradable materials are dead animals,
plants, and left over foods.
9) Non-Biodegradable
materials: Those materials
cannot be degraded by natural methods. Plastic bags, empty cans, electricity
wire, fused bulbs and broken parts of machines are no biodegradable materials.
10) The main cause of air pollution is burning of fuels.
11) The 3R are Reduce, Reuse and Recycle.
MCQs
Things around us make our……….
a) Habitat
b) Environment
c) Colony
d) Home
Living things get from their environment.
a) Food
b) Oxygen
c) Water
d) All above
The addition of harmful and unwanted materials in the environment are called;
a) Sanitation
b) Pollution
c)Global warming
d) None of these
The unfavorable alteration of environment due to human activities is termed as…
a) Ecological disturbance
b) Pollution
c) Catastrophe
d) All of these
