Trees can protect human beings from sandstorms, green the environment and produce carbon dioxide. However, in recent years, deforestation has caused some long-distance large-scale sandstorms to affect the central and eastern parts of China and move northward to Shenyang in the northeast. From March to May every year, as the wind in East Asia moves to the southeast, it causes sandstorms, sand blowing, sandstorms and other bad weather to China, Japan, South Korea and other East Asian countries. If there are no trees, the only earth that can make human beings live will bid farewell to green forever and put on a boring yellow coat forever. In 2004, the huge sandstorm made people aware of the terrible natural disasters and made people put the protection of the natural environment in the first place. So, how did the sandstorm come about? Strong wind, unstable airflow and abundant dust sources are three indispensable factors to form dust storms. Trees can resist strong winds and fix dust sources, so humans can't lack trees. According to statistics, an acre of forest can absorb 20-60 tons of dust a year; It can absorb 67 kilograms of carbon dioxide and release 49 kilograms of oxygen every day, which is enough for 65 adults to breathe; One acre of forest can absorb toxic gases-thousands of kilograms of sulfur dioxide a month; One acre of pine and cypress can secrete 2 kilograms of bactericide day and night, which can kill the diseased seedlings of tuberculosis, typhoid fever, laryngitis, dysentery and other diseases. This can purify the air and protect people's physical and mental health. Afforestation can also reduce noise, beautify the environment and maintain ecological balance; Provide people with an ideal environment for study, work, entertainment and living.
Realizing that trees are indispensable, humans began to plant trees: since February 198 165438, China has voluntarily planted more than 35 billion trees. China is implementing the "Three Norths" and six major forestry projects in the middle and lower reaches of the Yangtze River, such as key shelter forest construction, returning farmland to forests and grasslands, wildlife protection, nature reserve construction and natural forest protection. By the end of 2000, the forest coverage rate in China has reached 16. 55%, the per capita public green space in urban built-up areas increased to 6. 52 square meters, the total area of China Nature Reserve exceeds 1 100 million hectares.
According to the records of China Meteorological Department, there were only five strong sandstorms in China in 1950s, but in 1990s, there were 23. Dust weather has caused great social and economic losses in China. Environmental pollution makes people realize the importance of environmental protection.
Human civilization, whether in that stage of development or in the whole history, is always subject to human understanding of nature. When we re-examine the merits and demerits of human civilization in this sense, we are not confident enough to praise today's human civilization, at least not blindly. Because until now, our understanding of nature is still very limited. There is no doubt that human beings are only a member of nature, and all human actions that endanger nature will eventually be punished by nature. Therefore, we have to make a comprehensive review of today's human civilization and feel deeply worried about the future human civilization.
In the face of the deteriorating ecological environment of the earth, human beings have so far refused to give up local interests, making their desires expand day by day. The stronger the human desire, the more serious the damage to the ecological environment.
Human civilization is a great miracle that shines everywhere in the earth's biosphere. Whether it can last forever and reach a new height of civilization, so as to shine on the earth in the long future, its fate is in the hands of mankind itself.
Humans! Wake up! Please cherish the earth on which we live and truly achieve "beautiful environment-human health-civilized development".