Why is the temperature getting higher and higher?

The reason why the weather is getting hotter and hotter is that cars, planes and factories emit greenhouse gases such as carbon dioxide and methane into the atmosphere, forming a greenhouse effect.

The concentration of these greenhouse gases in the atmosphere is getting higher and higher, which makes the atmosphere form a greenhouse gas film, thus forming the greenhouse effect. The heat of the sun radiates to the ground and then reflects to the sky. Because of the greenhouse effect, this heat cannot be dissipated, which makes the earth's temperature higher and higher, leading to global warming.

Greenhouse effect principle

In the world, any object in the universe will radiate electromagnetic waves. The higher the temperature of an object, the shorter the wavelength of radiation. The surface temperature of the sun is about 6000K, and its electromagnetic wavelength is very short, which is called solar short-wave radiation (including visible light from purple to red). The ground is heated by the short-wave radiation of the sun, and at the same time it is cooled by the electromagnetic waves that radiate all the time.

The electromagnetic wavelength emitted by the earth becomes longer because of the low temperature, which is called ground long-wave radiation. Short-wave radiation and long-wave radiation have different experiences when passing through the earth's atmosphere: the atmosphere is almost transparent to solar short-wave radiation, but strongly absorbs ground long-wave radiation.

While absorbing long-wave radiation from the ground, the atmosphere itself radiates long-wave radiation with longer wavelength (because the temperature of the atmosphere is lower than that of the ground). The part that goes down to the ground is called inverse radiation. The ground will heat up after receiving inverse radiation, or the atmosphere will keep the ground warm. This is the principle of atmospheric greenhouse effect.