Question

what is meant by global warming ? Explain its causes. Why should global warming be considered global environmental problem ? Mention any other two global environmental problems.

Answer 1

Global warming is referred to the increase in average temperature of a place to a very high temperature  due to greenhouse gases , their presence in the nature. 

It's main causes include:-
1. Presence of green house gases like carbon dioxide, methane etc.
2. Pollution caused by humans
3. Change in climatic conditions.

It is very essential to consider it as a global environmental problem because this is very harmful to the world and has a great impact on the whole world.
It is a very huge problem which is needed to be solved as quick as possible as there many effects of it like melting of ice in polar regions etc.

Other global environmental problems include:-
1. Deforestation
2. Pollution
3. Ozone layer depletion etc.

hope it helps you....

Answer 2

global warming is the increase of earth's average temperature  due to effect of greenhouse gasses.

it's causes-

the increased amount of carbon dioxide and other greenhouse gasses released  by burning of fossils fuels, land clearing and other human activities  are the causes of global warming.
 
it should be considered as global environmental pollution because it has many harm full  effects on environment.

environmental problems r -

1.overpopulation

2.natural resource depletion