Why is it getting hotter and hotter now?

The reason why the weather is getting hotter and hotter now: the rapid increase of population in recent years is one of the main factors leading to global warming, and it also seriously threatens the balance between natural ecological environment.

With such a huge population, the annual carbon dioxide emitted by itself will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, thus directly affecting the climate change on the earth's surface. ?

There are also some natural factors: volcanic activity; Periodic orbital changes of the earth; The earth's periodic orbit changes from ellipse to circle, which is closer to the sun. According to a scientist's research, the temperature of the earth has been alternating between high temperature and low temperature, with certain regularity.

Extended data:

198 1~ 1990, the global average temperature increased by 0.48℃ compared with 100 years ago. The main reason for global warming is that humans have used a lot of fossil fuels (such as coal and oil) and released a lot of greenhouse gases, such as carbon dioxide, in the past century. These greenhouse gases cause global warming. In the 20th century, the world average temperature rose by about 0.6 degrees Celsius.

In the northern hemisphere, the thawing period of ice and snow in spring is 9 days earlier than that before 150, but the start time of autumn frost is about 10 days. The 1990s was the warmest decade since the mid-Kloc-0/9th century when temperature records began. The hottest years recorded are: 1998, 2002, 2003, 200 1, 1997.