Is at "natural" major factor in keeping the Earth warm and habitable, because it keeps some of the planet's heat that would escape from the atmosphere out to space.

However the "man-made" affects the air by the addition of gases from the burning of fossil fuels and so on.

-> Pollution which is emited vehicles contains carbon dioixde, which is one the main gas responsible for increase in greenhouse effect.

2. Deforestation

-> Large scale development have forced people to look for alternate places for living which has resulted in cutting down of trees;

-> The wood that is produced, when burnt releases more carbon dioxide into the atmosphere.

3. Increase in population

-> New manufacturing industries have come up release some harmful gases into the atmosphere which increases the greenhouse effect;

-> Also, more people means more usage of fossil fuels which in turn has aggravated the problem.

4. Industrial waste and landfills

-> Industries which are involved in cement production, fertilizers, coal mining activities, oil extraction produce harmful greenhouse gases; -> Also, landfills filled with garbage produce carbon dioxide and methane gas contributing significantly to greenhouse effect.

-> When the weather gets warmer, evaporation from land and sea increases. This can cause drought in areas of the world where the increased evaporation is not compensated for by more precipitation.

2. Less ice and snow

-> Worldwide, glaciers are shrinking rapidly;

-> Ice appears to be melting faster than previously estimated.

3. More extreme weather incidents

-> The weather climate will probably cause more heatwaves, more violent rainfall and also an increase in the number and/or severity of storms.

4. Rising sea level

-> Sea level rises, because of melting ice;

-> Areas that are just above sea level now, may become submerged;

-> Coastal, marine plants and animals will be affected

2. Use less heat and air conditioning;

3. Replace your light bulbs;

4. Drive less and drive smart;

5. Buy energy-efficient product;

6. Use less hot water;

7. Use the "off" switch;

8. Plant a tree;

9. Encourage other to conserve.