It is getting hotter and hotter in summer. How hot will it be in a few years? Can human beings survive under natural conditions?

The global greenhouse effect is becoming more and more serious. It's not just that summer is getting hotter. It may get cold (or not) in winter. But at present, it seems to be short-term (thousands to n million years). Not that life can't survive. However, it may lead to extinction of some species, drought, rising sea level, water shortage and more frequent natural disasters. A large number of people's lives may become difficult because of this. It may lead to more famines, conflicts and wars. It may cause the collapse of human society. Although many people can survive, it is certainly difficult to survive, so civilization has regressed and the environment has been destroyed more by conflicts. ?

It is getting hotter and hotter in summer. Unlike going out to play in the past. It is almost impossible to go out in summer. This is because the changes in the natural environment have made the global temperature warmer, many of which are man-made? Contribution? Yes

It is also wrong for us to blame the current warming on human activities. In our ancient times, there was very hot weather, because the earth entered a hot period and the global temperature was rising. In the past, human beings could survive without the assistance of any modern industry, not to mention our present people.

There are many reasons for global warming. The main reason is that humans have used a lot of fossil fuels (such as coal and oil). In the process of industrialization in the past century, a large number of greenhouse gases such as carbon dioxide have been emitted. These greenhouse gases are highly permeable to short-wave radiation from the sun and highly absorptive to long-wave radiation reflected from the earth, which is often called the greenhouse effect and leads to global warming.

According to scientific research, the highest surface temperature that humans can tolerate is 42℃, but now our global average temperature has not reached this point. Although the local temperature in some places can reach above 40℃, and some even reach 50℃, in this case, human beings can still survive, but they can't be exposed to the sun for a long time.

With the continuous progress of science and technology, human beings will certainly transform the environment. They will try their best to transform the environment and adapt themselves to survival, and they will also take a series of measures on how to cool down. If we have to say how long human beings can live, it is probably the destruction of the earth or the exhaustion of resources.