For millions years , the earths climate constantley been changing , from our iceages to warmer years , but in the last century our climates temperature has been rising at alarming rates , from about 1.3 to 1.5 degrees fareinghnheight . Scientists beleive that it is our own human activity , thats is the cause of this rising temperature , and this is the process that is called " global warming".
Dating back to the times when the industrial revelution began , factorys , trains , and eventually cars , have burned fossil fuels such as oil and coal , which were and still are , releasing hudge amounts of carbon dioxide , and other gas's into our earths atmosphere . These green house gas's , or trapped heat near the surface of the earth , are formed by a natural process of the sun , and this is called the " greenhouse effect" . The green house effect , begins with the sun and the imagery it radiates to the earth. The Earth and the atmosphere absorb some of this energy , and the rest is radiated back into space. Now with that being said , these Natuarlly occuring gas's , in the atmosphere trap some of this energy and reflect it back, thus , warming the earth . Scientists now believe that the green house effect is getting intensified by all the extra green house gas's that humans are releasing .
Signs of global warming , include a recent pattern of very warm years. Futher more , readings taken from ice core samples , in the arctic icepack ,Show that green house gas's , C02 , and methane , have hit there highest levels in 420,000 years , which is causing this ice to melt. Our sea ice has declined 10% in the last 30 years .
As long as our nations around the globe , consume these energy's , and increase their feul consumption , the overall mass of green house gas's will continue to rise . Researchers predict that our temperature will increase by 2 - 10 degrees farenheight by the end of the century . What is uncertain is what rising temperatures ,will mean for our planet . Some focast rising sea levels which of coarse would mean floods , along coastal areas around the world . Weather patterns are changing also , making huricanes more frequent , severe drought is more common in warm areas , and species which are unable to adapt to this change will face a hudge drop in numbers and inevitably , extinction .

