2. When harmful substances
contaminate the environment it is
called pollution .
Pollution refers to the very bad
condition of environment in
items of quantity and quality .
3.
4. Combustion of gasoline and other hydrocarbon
fuels in cars,trucks,and airplane.
Burning of fossil fuels.
Insecticides.
Herbicides.
Mining operation.
5. Acid rain is rain that usually acidic.
It can cause harmful effects on plants, aquatic animals .
When carbon dioxide, sulfur dioxide and nitrogen oxides
reacts with water molecules in atmosphere, acid rain is
produced.
Co2 + sulfur + nitrogen +water molecules→acid rain
6. Water pollution occurs when pollutants are discharged
directly or indirectly into water bodies.
Water pollution affects plants and living organisms
living in it.
7.
8. Land pollution is the degradation of the earth
surface.
Land pollution occurs when waste is not disposed
properly.
Land pollution is the addition of undesirable
matter to the land that damage the terrestrial
organisms .
