For 2.5 millions years the earth climate has fluctuated cycling from ice age to warmer periods but in last century the planet temperature has reason unusually fast about 1.2 to 1.4 degree Fahrenheit. Scientist believes its human activities that driving the temperature up a process known as global warming. Ever seen the industrial revolutions began factories, power plants and eventually cars have burn fossils fuel such as oil and coal releasing huge amount of carbon dioxide and other gases into the atmosphere. These green house gases trap heat near the earth through a naturally occurring process called the green house effects. The green house effect began with the sun and the energy radiated to the earth.
The earth and the atmosphere absorb the some of this energy and the rest is radiated back into space. Naturally occurring gases in the atmosphere trap some of this energy and reflected back warming the earth. Scientist now believes that the green house effect is being intensified but the extra green house gases that the human have released. Evidence of global warming includes the recent string of very warm air. Scientist reports that 1998 was the warmest air majored in history but 2005 coming in second. Mean while reading taken from ice core shows that the green house gas carbon dioxide and methane have hit the highest level in the past four hundred and twenty thousands years.
Artic sea ice is also shrinking, according to the NASA studies, the extinct of artic sea ice has decline about 10% in the last 30 years. As long as industrialized nations consumed energy and developing countries increased their fossil fuel consumptions. The concentrating of green house gases in the atmosphere will continue to rise. Researchers predict the temperature increase about 2 to 10 degree Fahrenheit by the end of the century but lesser in this rising temperature mean for the planet. Some climate model predicts sudden changes, others forecast rising sea level which could flood the coastal area around the world. Weather patterns could change making hurricane more frequent, sevior drought could become more common in warm areas and species unable to adapt to the change in condition would face extinction
Although much remains to learn about global warming, many organizations advocate cutting green house gas emission to reduce the impact of global warming. Consumers can help by saving energy around the house switching to the CFL bulb and driving the fewer miles in the car each week. This simple change may help to keep the earth cool in the future
