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? It turned out that man himself caused the disaster.
With the rapid development of human high technology, the side effects of science are gradually emerging, and global warming is an example. The weather is hot, and soaking in air conditioning in the heat has become a new "hobby", but have people ever thought about the negative effects that air conditioning will bring? Of course, the answer is yes. The gas discharged from air conditioners contains a lot of methane, which is also a gas that causes global warming. At the same time, air conditioning will waste a lot of electricity, so try to avoid using air conditioning.
And another reason is: carbon dioxide! Automobile exhaust and factory exhaust contain a lot of carbon dioxide, which is the most likely to cause greenhouse effect (that is, global warming). There are more and more cars now. According to statistics, there will be 700 million cars in the world by 2 1 century. Many exhaust gases have seriously affected us, such as cough, sore throat ... and most importantly, global warming. Statistics show that the per capita carbon dioxide emissions in the United States have reached 20 tons a year! China's annual per capita carbon dioxide emissions are also 2.5 1 ton a year! The environment around us is undergoing serious changes.
The more important reasons are: sharp decline of forests, destruction of water resources, serious destruction of ecological chain, barren land and serious water pollution. According to statistics, 65,438+00% of the rivers in the world are polluted, and the supply of fresh water has become a problem. At the same time, due to the extensive use of minerals, the burning CO2 gas leads to air pollution, while the ozone layer is severely damaged, and ozone holes appear in the north and south poles, which aggravates the environmental deterioration. If this vicious circle continues, it will eventually.
What kind of tragedy is this? Of course it is obvious! The weather is getting warmer, the sea level is rising, the polar glaciers are melting, and coastal cities and island countries are flooded. These have seriously affected the survival of mankind. Experiments show that the sea level will rise by more than half a meter in the next 300 years, which is still the most optimistic data. In another seven years, global warming will continue irreversibly. What's even more frightening is that due to the melting of the Arctic ice and the intensification of rainfall, a large amount of fresh water will flow into the North Atlantic, destroying the Mexican warm current. I'm sure you've seen the film The Day After Tomorrow. The scene in the play is a true portrayal of our planet hundreds of years later: tornado, ice crack, sudden drop of temperature, ice storm, freezing rain, earthquake, flood, tsunami ... This is not a crazy fantasy, but it will become a reality if human beings don't stop destroying the environment! Global warming is not only hot weather, but also many negative effects!
In order to save the earth, we should try our best to do it: don't turn on the air conditioner, use recycled environmental protection paper, discard meat (steak) food (the digestion of cattle contains nitrous oxide, if you become a vegetarian, reduce carbon dioxide emissions 1.5 tons every year! ) don't use plastic bags, take the bus ... every bit of life. In fact, environmental protection is not difficult. As long as you support environmental protection, that is your best gift to the planet. You don't need too many words. As long as everyone acts, it will be a powerful force! Today, Japan, Britain, the United States and other countries have taken action. Although we have taken action, it is still not enough for a big country with a population of 654.38+0.3 billion.
Therefore, being alert to global warming is the only way for all mankind to save the earth. Some people may say: can't we move to other planets? The answer is yes, but how many people can it accommodate? Some people say that the funds for controlling the greenhouse effect are too large, which is sky-high for finance. However, if we keep dragging on, the final result will be that our earth is beyond recognition, not to mention finance, and even our own lives will be in jeopardy! Therefore, environmental protection should not just stay in words, but should really be implemented in action.