Global Warming

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

 Global Warming

Global warming means increasing temperature of Earth's atmosphere. It started in the 19th century and it still continues. To this day, the temperature of the Earth has increased by about 0.8 ° C.Global warming cause people namely the burning of fossil fuels and deforestation. Probably in 21st century temperature will raise a further 1.1 to 2.9 °C.The effects of an increase in global temperature is rising sea levels and changes in the amount and pattern of precipitation, as probable expansion of subtropical deserts. Warming is expected to be strongest in the Arctic and would be associated with the retreat of glaciers and sea ice. Between other effects of the warming include occurrence of extreme-weather events. How heat waves, droughts and heavy rainfall, ocean acidification and species extinctions due. Main effects for humans includes threat to food security .

If you want to test how you stand with information about global warming I add quiz for you.

http://environment.nationalgeographic.com/environment/global-warming/quiz-global-warming/