Đang chuẩn bị liên kết để tải về tài liệu:
FACTS ABOUT GLOBAL WARMING

Definition “The earth is a natural greenhouse and is kept warm by water vapors, carbon dioxide (CO2), and other gases in the atmosphere, which absorb the sun’s energy and radiate it back toward the earth. This type of warming is called ‘natural greenhouse effect’. ‘Enhanced greenhouse effect’, on the other hand, causes global warming due to excessive levels of CO2 in the atmosphere.” Facts Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies. The rate of warming is increasing. The 20th century's last. | FACTS ABOUT GL BAL WARMING visit www.go-green.ae go green An Ekotribe Initiative Definition The earth is a natural greenhouse and is kept warm by water vapors carbon dioxide CO2 and other gases in the atmosphere which absorb the sun s energy and radiate it back toward the earth. This type of warming is called natural greenhouse effect . Enhanced greenhouse effect on the other hand causes global warming due to excessive levels of CO2 in the atmosphere. Facts Average temperatures have climbed 1.4 degrees Fahrenheit 0.8 degree Celsius around the world since 1880 much of this in recent decades according to NASA s Goddard Institute for Space Studies. The rate of warming is increasing. The 20th century s last two decades were the hottest in 400 years and possibly the warmest for several millennia according to a number of climate studies. The United Nations Intergovernmental Panel on Climate Change IPCC reports that 11 of the past 12 years are among the dozen warmest since 1850. The Arctic is feeling the effects the most. Average temperatures in Alaska western Canada and eastern Russia have risen at twice the global average according to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004. Arctic ice is rapidly disappearing and the region may have its first completely ice-free summer by 2040 or earlier. Polar bears and indigenous cultures are already suffering from the sea-ice loss. Glaciers and mountain snows are rapidly melting for example Montana s Glacier National Park now has only 27 glaciers versus 150 in 1910. In the Northern Hemisphere thaws also come a week earlier in spring and freezes begin a week later. green An Ekotribe Initiative visit www.go-green.ae Coral reefs which are highly sensitive to small changes in water temperature suffered the worst bleaching or die-off in response to stress ever recorded in 1998 with some areas seeing bleach rates of 70 percent. Experts expect these sorts of events to increase in frequency .