Sewage- Sewage is the liquid waste product from
homes, hospitals, laboratories etc.
Oil Spills- Oil spills is the spillage of oil into the
Biological Magnification- The phenomenon of
concentration of harmful substances inside the body is called biological
Plankton- Planktons are forms of marine organic life
that gather vital energy for life through photosynthesis.
Aerobic- Aerobic is 'oxygen requiring'.
Acid Rain- Sulphur dioxide and nitrous
oxides released from industries and automobile exhausts combine with rain
water in air to form acid water called acid rain.
Pollution- An undesirable change in the physical,
chemical and biological characteristics of water, air and land which is
harmful to plant and animal life is called pollution.
Pollutants- Substances that cause pollution are called
Non-Degradable Pollutants- Pollutants that are
not biologically degradable are called non-degradable pollutants.
Degradable Pollutants- Pollutants that are biologically
degradable are called degradable pollutants.
Radioactive Pollutants- Nuclear explosion,
nuclear testing and testing of nuclear weapons reproduces radioactive
substances called radioactive pollutants. E.g. strontium-90.