1 parameter

2. Arguments

3. Demonstration

Be alert to global warming

In recent years, people feel that the weather has suddenly become hot. The original cool autumn almost didn't start until the end of 10, and the hottest day in August actually reached more than 40 degrees. Why is this? It turned out to be human's own fault.

What causes global warming?

There are two reasons for the warm weather: burning a lot of fuel and releasing a lot of carbon dioxide; The destruction of forests, especially tropical rainforests, leads to the reduction of carbon dioxide absorption by vegetation, the increase of carbon dioxide content in the atmosphere, and the strong absorption of long-wave radiation by carbon dioxide. With the industrial development of today's society, many factories burn a lot of fuel every day and emit carbon dioxide, which has an impact on the climate. Some enterprises cut down trees and destroy forests in order to get rich quickly. The lush and shady forest has turned into a desert, which has become one of the most important reasons for global warming. People only know how to extend greedy hands to nature and ask for resources, but they neglect to protect the environment. Natural disasters such as sea level rise and floods are all warnings issued by nature to human beings, but many people disagree and continue to destroy the huge ecosystem of the earth, and many animals are on the verge of extinction.

Many people think that global warming has no effect on human life, but in fact, climate warming is closely related to human life. Climate warming makes polar and alpine glaciers melt rapidly, sea water expands and sea level rises, flooding coastal lowlands and plains. Leading to changes in the global agricultural structure. At present, there has been a huge hole in the ozone layer over Antarctica. Strong sunlight and ultraviolet rays directly hit the South Pole, and the glaciers in the South Pole are melting at a rate of 250 cubic kilometers per year. Of course, there are also reasons for climate warming. Global warming will indirectly affect the development of global agriculture, industry and economy.

Now, many people have realized the seriousness of global warming and taken some effective measures: first, reduce the use of fossil fuels, develop and utilize new energy sources, and improve energy efficiency. This will slow down the energy consumption on the earth and help control global warming. The second is to plant trees and restore vegetation. Reducing the area of land desertification, reducing soil erosion and reducing the probability of natural disasters such as sandstorms are also beneficial to the global climate.

In order to save the earth, we should do the following: try not to turn on the air conditioner in summer, use recycled environmental protection paper, and discard meat (steak) food (the digestion of cattle contains nitrous oxide, and if you become a vegetarian, reduce carbon dioxide emissions 1.5 tons every year! ) don't use plastic bags ... to protect the environment, start from the side, start from small things, and start from small things in life. China is a powerful country with a population of1300 million. If everyone acts, this power will be infinite. It's no use just talking and not doing, classmates, take action and make some contributions to the earth, our common home!