Pollution is harmful substances in the air, water, or soil. Water pollution can be either man-made, such as from fertilizers, factory waste dumping, oil leaks, or trash dumping in water, or natural, such as from rain washing pollutants from the air and soil into lakes and ponds. The document defines pollution and discusses the sources and types of water pollution.

1. WHAT IS POLLUTION?
Pollution is harmful things
in the air, water or soil.

2. WATER POLLUTION
Man made water pollution
Natural water pollution

3. MAN-MADE
WATER POLLUTION
Using fertilizers to help plants grow
Factories dumping their wastes
Oil leakage
Dumping trash in the water

4. NATURAL WATER POLLUTION
Rain water washes the harmful pollutants in the
air and soil into the lakes and ponds