Histroy record and Forcast

The mainstream scientific consensus that global warming is more and more obviously every day and changed our climate and environment. In the last 400-600 years of continued worldwide on global warming. Since the beginning of the 20th century, the surface of the earth's average temperature increased about 0.6 degrees Celsius (1f). Over the past 40 years, the temperature rise about 0.5 f (0.2-0.3 ° c) in the 20th century is more than any other time. In the 1990s. One of hottest year is 1998. Natural environment change of earth it is slowly warming up and alpine glaciers are gradually subsid. During last four years the arctic ice thickness has dropped about 40 percent. Global sea-level rise for about three times faster than the past 100 years than in previous 3000 years. Through research that shows plants and animals gradually chang their activity and behavior to respond climate change.While many of the world's scientists to predict the future is in 50-100 years, humans will fully into a warming world. The impact of human activities in the 21st century the greenhouse gases that future increase in global temperature of 100 increases rapidly. The global average surface temperature will increase by between 1.4 ° c - 5.8 degrees Celsius.