sábado, 7 de agosto de 2010

GLOBAL WARMING




For 2,5 million years, the earth climate is fluctuated, cycling from ice ages to warm periods, but in the last century the planet’s temperature has risen unusually fast, about 1,2 to 1,4 degrees fahrenheit. Scientists believe it's human activity that is driving the temperature up, in a process known as Global Warming. Ever since the Industrial Revolution began, factories, power plants and eventually cars have burnt false fuels such as oil and coal releasing huge amounts of carbon dioxide and another gases into the atmosphere. These greenhouse gases trap hit near the earth through a naturally occuring process called greenhouse effect. The greenhouse effect begins with the sun and the energy radiate to the earth, the earth and the atmosphere absorve some of these energy,while the rest is radiated back into space.

Naturally occuring gases and the atmosphere trap some of these energy and reflect it back warming the earth. Scientists now belive that the green house effect is been intensified by the extra greenhouse gases that human have released.

Evidence for global warming includes a risen strain of a very warm years, scientists reported that 1998 was the warmest year in major history, but 2005 coming as second mean, while reading staking from ice core, show that the greenhouse gases carbon dioxide and methane have hit the highest levels in the past 4.2 thousands years. Arctic sea ice is also shrinking. According to NASA studies, the extent of artic sea ice declined about 10% in the last 30 years. As long as industrialized nations consume energy, and developing countries increase their false fuel consumption, the concentration of greenhouse gases in the atmosphere will continue to rise. Researches predict that the temperature will increase about 2 to10 degrees fahrenheit by the end of the century what is lesser in the earth rising temperature mean for the planet.


Some climate models predict several changes, others forecast rising sea level which could flood various areas around the world, weather patterns could change making hurricanes more frequent, several dries could be more common in warm areas, and species unable to adapt to the changing conditions would face extinction. 

Although much remains to be learned about global warming, many organization advocate greenhouse gases emissions to reduce the impact of global warming.
Consumers can help by saving energy around a house using the compact flourescent light bulbs, and driving fewer miles in the car each week.
These Simple changes may help keep the earth cooler in the future.

1 comments:

W.C.A !... disse...

olá prof. aqui é o wagner do 1º5 ...n sei se vc recebeuy meu email ...é q fiz uma atividade do seu blog q eu estava sem nota e tirei 6 e as outras notas tireium 8 e 9 q eu tinha feito como robson ...valeu po seguir meu blog ,se responder meu comentário ,responda pelo meu blog http://wagner1993.blogspot.com ou por email wag93and@gmail.com ...good night !

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