The weather in the north is getting warmer and warmer.

On the steep mountainside of Miyun, Beijing, 550 meters away, the first time pointed cap grass appeared. Does it mean that the weather in the north is getting warmer?

For this question, whether the discovery of Pennisetum in Beijing can explain the gradual warming of the weather in the north remains to be verified.

Although Cephalotaxus grandis' growth habit was once in the south of China, it was also distributed in the north of China. Because the climate in some parts of China is different and the temperature is quite different from other places, it is very likely that plants in the south can also survive in the north, and some plants in the north can also survive in the south.

This phenomenon is also very common, but the weather in the north is really getting warmer, and glaciers are melting because of the rising global temperature. It also makes the weather in the north of China gradually warmer, and many plants and animals in the south can survive in the north.

The main cause of global warming is human factors.

The cause of global warming is the rapid growth of population. Atmospheric environmental pollution. The deterioration of marine ecological environment and other factors. Population growth is one of the main reasons for global warming. At the same time, it is also the most serious threat to the balance of natural ecological environment. So many people, their own annual emissions of carbon dioxide is a very large number.

So it leads to the continuous increase of carbon dioxide in the atmosphere. This also forms the change of the earth's surface temperature. Environmental pollution is also a serious factor, which constitutes a very important problem and is also one of the main causes of global warming.

The study of global warming in 2 1 century clearly points out that the surface temperature of the earth will rise when it is lonely again. Factors of marine ecological environment deterioration. The change of sea level continues to rise. If no measures are taken, it will lead to the destruction of fresh water resources and environment. And pollution. Human activities have caused pollution and destruction to the ecological environment in coastal areas. This has led to the destruction of marine ecological environment system and serious ecological system security problems.