第九期4/7

Ultimately, more greenhouse gases mean more infrared radiation trapped and held, which gradually increases the temperature of the Earth's surface and the air in the lower atmosphere. Thirdly, what are the possible consequences caused by excessive greenhouse effect? It directly results in quick increase of the average global temperature. Today, the increase in the Earth's temperature is increasing with unprecedented speed. To understand just how quickly global warming is accelerating, consider this: during the entire 20th century, the average global temperature increased by about 0.6 degrees Celsius while by using computer climate models, scientists estimate that by the year 2010 the average global temperature will increase by 1.4 degrees to 5.8 degrees Celsius, which is rather a big leap from the last century.