Greenhouse gases

Greenhouse gases which also called global warming.The earth is about 60 degrees Fahrenheit (33 degrees Celsius) warmer than it would be if it did not have the atmospheric blanket of greenhouse gases and clouds around it. Clouds and greenhouse gases keep the earth warm. Once warmed, their molecules then radiate a portion of this heat energy back to earth, creating more warming on the surface of our planet. It is this radiation which causes atmospheric gases to move back to earth that scientists call the "greenhouse effect".

http://en.wikipedia.org/wiki/Greenhouse_gas

Emmision from factories

Air pollution and emmsion from factories are the same thing. Invisible or not, air pollution can cause a lot of damage. Even a little air pollution can make your eyes burn and your head ache. It can tire you out, blur your vision, make you dizzy, and make it hard for you to breathe. Air pollutants can also affect asthma and make it easier for you to catch a cold or the flu. Air pollutants have also been linked to some cases of serious disease such as lung cancer and heart ailments. In fact, some scientists believe that air pollution costs Americans billions of dollars a year in doctor bills and unearned paychecks due to pollution-related illness.

http://www.ametsoc.org/sloan/cleanair/cleanairstationary.html

Effects of global warming

There are many effects of global warming and they are very dangerous effects. First effect is that will be more floods and last reports showed that there is an increase in the sea level. Another effect is increased spread of infectious diseases and the experts said it's anusual thing. Degraded water quality. One more effect is abrupt climate change National Academy of Sciences found that that warming do to climate change and human activities "may increase the possibility of large, abrupt and unwelcome regional or global climate events." The NAS found that.

http://en.wikipedia.org/wiki/Effects_of_global_warming

Causes of global warming

There are two types of causes for this problem, the first type is natural causes and the second type is man-made causes. Natural cause such as the methan gas or the greenhouse gas which is the gas that traps heat in the earth's atmosphere. However the man-made causes are much more than the natural causes these days beacuse of the technology. One of the man-made causes is pollution which comes in many shapes. Burning fossil fuels is one thing that causes pollution because fossile fuels produce CO2. Another cause of global warming is the population because more people means more food and more method of

transportation and more method of excretion.

http://www.answers.com/causes%20of%20global%20warming