Why is it so hot these years?

Due to global warming, it will be hotter after 20 12. . .

Global warming is a "natural phenomenon". Because people burn fossil minerals to generate energy or cut down forests to burn, many greenhouse gases, such as carbon dioxide, are produced. This gas has high permeability to visible light from the sun, high absorption to long-wave radiation reflected by the earth, and can strongly absorb infrared radiation from the ground, which is commonly called "greenhouse effect" and leads to global warming.