i) Do not pour leftover oil, old medicines or waste down the drain or into, the toilet.
ii) Reduce the use of chemical pesticides and fertilizers to grow crops.
iii) Use waste water for garden in home.
iv) Do not litter or dump waste- always use- a waste bin.

Any substance that causes polution is known as pollutant. Chemicals, pesticides, smoke, crackers are the Pollutant.

There are four major kinds of pollution:
i) Air pollution
ii) Water pollution
iii) Land (soil) pollution
iv) Noise pollution

i) Natural ecosystem
ii) Artificial ecosystem are the two types of ecosystem.

Ecosystem is a community of living and non-living things that work together.

(i) Learning food chain help us to understand the feeding relationship and interaction between organisms in any ecosystem.
(ii) Understanding the food chain also helps us to appreciate the energy flow and nutrient circulation in an ecosystem.
(iii) The food chain can be used to understand the movement of toxic substances and their impacts.

Some wastes are degraded by bacteria, fungi and Some insects. It will become as a fertilizer. This type of waste are called as biodegradable waste.
(e.g) Vegetables and fruit wastes, food and garden waste.

i) Cycle or walk short distances instead of using a motor vehicle.
ii) Travel by public transport (bus or train)
iii) Do not bum solid waste.
iv) Avoid fireworks.

(i) Noise pollution affects the environment. Unpleasant or loud sounds distrub us. This is called as noise pollution.
(ii) Loud music the sounds of motor vehicles, fireworks and machines causes noise pollution.
(iii) Continuous noise disturbs our sleep and does not let us to study and also it make stress and health impacts.
(iv) It is also disturb animals, bird and whales in under water.
(v) To reduce noise pollution lower the volume when you watch TV or listen to music.
(vi) Remind drivers not to use the horm too much.
(vii) Avoid fire works and do not speak loudly.

(i) If we remove an organism from the food chain leads to lack of energy transfer to higher trophic level organism and it will become to die.
(ii) So the entire ecosystem will affect.

i) The burning of solid waste in incinerator is called incineration.
ii) Human anatomical wastes (discarded medicines, toxic drugs, blood, pus) are disposed by means of incineration.
iii) During incineration, the enormous heat kills all contagious disease-causing germs.

Pollution is an unwanted change in the physical, chemical and biological characteristics of our land, air and water.