The document discusses water pollution and its causes. Water pollution is defined as any undesirable change in the physical, chemical, or biological characteristics of water. The main causes of water pollution identified are domestic sewage containing pathogens, waste water from industries like petroleum and chemicals, and algal blooms caused by excess nutrients. The document recommends giving awareness about water pollution, controlling the disposal of domestic sewage and industrial waste into water bodies, and protecting water from algal blooms.

1. GREESHMA GOPAN M
NATURAL SCIENCE
MILLATH COLLEGE OF TEACHER EDUCATION
SOORANAD

2.  Pollution is any undesirable change in
physical, chemical or biological
characteristics of air ,land, water or soil.
 Agents that bring about such as undesirable
change are called pollutants

3.  Water pollution is any undesirable change in
physical ,chemical or biological
characteristics of water.
 Human beings have been abusing the water-
bodies around the world by disposing into
them all kinds of waste
 Due to the activities of human kind , the
ponds, lakes, rivers and oceans are becoming
polluted, in several parts of the world.
 It is the contamination of water.

5.  Domestic sewage and which contain many
undesirable pathogenic micro organisms.
 Waste water from industries like petroleum,
metal extraction, chemical manufacturing.
 Algal bloom, which imparts a distinct colour
to the water bodies.
 Natural disaster.

6.  Give awareness
 Control the disposal of domestic sewage into
water.
 Protected from Algal bloom.
 Control the disposal of industrial waste.