A composition about plants.

The tree, the umbrella of mankind, the Cambridge tree, is amazing. I often look up at a big tree, with its shade in summer and fallen leaves in autumn. I also often touch a big tree, a tree that has been cut off by people, its scars, and the roots of bare trees in the virgin forest. I miss trees like sunshine! Yes, this tree is simply our myth. Trees, trees that can shed their leaves in autumn, trees that can grow new branches from their roots after being hit hard, and trees that can release the sunlight sucked into their bodies to the world! Without trees, there would be no us, and there would be no animals walking and running around us Before winter comes, let's express our condolences to the trees around us: the oxygen that we human beings depend on is released by trees. They don't need our care, they suck the dirty waste gas from the earth into their bodies and then replace it with fresh oxygen for us. In summer, they bring us shade and shelter from the wind and rain, but in autumn, their leaves will fall out. Trees, big trees, the greatness of a tree lies in its fallen leaves. Fallen leaves become dirt and dust, nourishing the earth and us. Facing a tree, we know what is noble. Trees convert absorbed sunlight into heat energy. Trees can burn and release heat. Even after hundreds of millions of years of death, they still bring endless energy to the world. Trees (coal and oil) buried underground for hundreds of millions of years make us live a warm and comfortable life. Scientists have found that global green plants can hydrogenate 42 billion-60 billion tons of carbon and 7.7 billion-65.438+0.66 billion tons of carbon into petroleum-like alkanes every year, and convert solar energy into chemical energy for storage. Trees are magical, and we should clone this magic. Trees, evergreen trees, hold out apples, pears and peaches for us. Trees are the recorders of natural history. Many wonderful trees are recorded in Shan Hai Jing. Shan Hai Jing begins with a description of a valley tree that won't let people get lost. The head of Nanshan is Que Mountain, and a tree with black branches grows on the mountain. The tree radiates light and shines on the mountains. People won't get lost if they wear it. "Shan Hai Jing" also recorded Fructus Aurantii, saying that this kind of tree grows on the peaks on the south bank of the Yellow River. Its leaves are round, its flowers are red, its calyx is white, its trunk is black and its fruit is like bitter orange. People believe that people who eat its fruit will have many children and grandchildren. Some people say this is an orange tree. Oranges are produced in the south. If you move the orange tree to the north of the Yellow River, it will become a bitter orange. It is also said that this tree belongs to Rutaceae, and its immature fruit can be used as medicine. We call it immature bitter orange and immature bitter orange. The most interesting thing is Mu Dan. Mu Dan has round leaves and yellow flowers. Its red stem bears red fruit, and the fruit tastes sweet. People won't feel hungry after eating it. After five years' growth, Mu Dan is full of colors, flavors, colors and flavors. It is said that the mountain with Danmu is the birthplace of Danshui, where jade paste is often poured out, white and black. According to legend, the Yellow Emperor ate white jade paste from the source, and black jade paste was used to water Mu Dan. The Yellow Emperor took jet cream and watered it for many years, and cast it on the south slope of Zhongshan, facing the sun. As a jade seed, the fruit is hard and soft. People who eat it can make money and avoid disaster. Even the ghosts and gods between heaven and earth are vying to cook with it. These wonderful trees, can we clone them? Some people may say that this is just a myth. How can we take it seriously? In our real life, there are many kinds of strange trees. In northern Africa, there is a luminous tree, which glows all over at night and is a real fire tree. There is also a tree that can shine at night in Jinggangshan area of China. People call it "lantern tree". Every sunny night, this tree will shine like a million lights hanging during the festival. If we can clone this tree and plant it on both sides of the road, we can make it replace street lamps. There is a tree that can produce milk. It produces milk. This kind of milk tree grows in Costa Rica, Ecuador, Venezuela and other countries in South America. Milk tree is thick and tall, with smooth bark and shiny leaves. The milk it produces is similar to milk, in taste and composition. When local residents want to drink milk, they cut a small hole in the tree with a knife, and milky juice will flow out. Milk produced in milk tree is rich in sugar, fat and protein, and people there are very healthy. Can we clone this milk tree? If possible, we can plant it in poor mountainous areas, so that all children there can eat this free milk, so that hard-working farmers can also eat this free milk, so that they can work hard. A tree can store energy and sweetness in its body. It is said in the Miraculous Classic * Nan Man Classic that there is a kind of tree called pear tree in the wild land. Pear blossoms last for 3,000 years and bear fruit for 9,000 years. The fruit is nine feet long and nine feet around, but it has no pulp and stone. If you cut it open with a knife, it will be like condensed honey. People who eat this fruit will live a long life, and can live to 12000. In real life, there are no honey trees that can make people live longer, but there are "sugar maple trees" that can flow "sugar juice". This kind of tree grows in North America. It is thirty or forty meters high. Autumn is coming, the leaves turn red, and the red leaves all over the mountain are charming. Canada grows sugar maples, and they have the tradition of Maple Festival. Every April, people drill holes in sugar maple trees to get sugar. At this time, the streets and alleys of Canada will be filled with all kinds of sweets, which are made from the juice of sugar maple trees. It is said that Indians knew about sugar maple trees as early as 300 years ago. They drill holes in the trunk to collect juice, dehydrate and boil maple sugar. A sugar maple tree growing for more than 0/5 years/kloc can produce more than 360 liters of sugar every year, and each tree can produce sugar continuously for about 50 years. Can we clone this sugar maple to help the poor? Planting sugar maple trees in poor areas, of course, in addition to sugar maple trees, we can also clone salt-producing trees. At the junction of Heilongjiang Province and Jilin Province in China, there is a "wood salt tree". We can clone these trees that are beneficial to human beings and help the poor. Of course, we can also try to clone crops that produce salt in saline-alkali land and turn waste into treasure. Oil and coal, the underground treasures from trees, will be hollowed out one day with the increasing world population and the continuous development of industrial production. These oils and coals were converted from trees hundreds of millions of years ago. Scientists have discovered a large number of plants that can directly produce oil. The bitter bark tree and the fragrant branch tree in the tropical forest of Brazil are the famous "oil trees". Kupeiba is 30m high and10m thick. If you make a hole in the trunk of Kupeiba, the crude oil in the tree will flow out, and you can produce 25 kilograms of oil a day and a night. This kind of oil can directly use natural diesel oil, so Kupeiba is also called "diesel tree". Each camphor tree can produce 50 kilograms of gum juice similar to petroleum components every year, and can also be directly used in diesel engines without refining. In Hainan Island, China, there are 12- 15 meters of Phoebe bournei trees, which can produce oil at any time 10- 12 kg. At present, there are dozens of "oil trees" found around the world. Cloning and planting oil trees, energy experts in the field of biotechnology predict that 2 1 century will be the century of vegetable oil. Calvin of the University of California, winner of 1986 Nobel Prize in Physiology, planted 0.4 hectares of "oil tree" in California and harvested 50 tons of oil every year. Britain, France, Japan, Sweden, Brazil and Russia have also carried out research and utilization of "vegetable oil", and the United States has also established a "vegetable oil" research institute. As a new energy source, vegetable oil has incomparable advantages. Vegetable oil is a kind of green and clean energy. Trees absorb carbon dioxide in the process of growth and will not produce environmental pollution. "Vegetable oil" has a wide distribution range, and can be planted by using land according to local conditions, and local materials are used without exploration and drilling; No need for long-distance transportation; Cloning oil trees and planting oil trees have low cost and good safety. The solar energy stored by green plants in the world is equivalent to 8 trillion tons of standard coal. 90% of them are stored in forests, and the annual growth alone is equivalent to 60-80 billion tons of oil. Therefore, many countries have established a brand-new oil production base-"Oil Tree Garden". The United States has planted hundreds of thousands of hectares of fast-growing oil trees all over the country, and their energy department has also established 35 "vegetable oil" experimental fields composed of poplar, alder, locust and eucalyptus; Switzerland's "Green Energy Plan" took 10 years to clone and plant 654.38+10,000 hectares of "oil trees" to meet 50% of the country's annual oil demand; The Philippines has planted 65438+ 1 00000 hectares of acacia, and it is estimated that 65438+1000000 barrels of oil will be harvested next year. Brazil has 2 million hectares of fast-growing eucalyptus forests; Britain has planted 6,654.38 million hectares of oil trees. In order to encourage the planting of oil trees, European countries have made a decision to reduce the consumption tax on "plant fuel" by 90%. In order to make full use of vegetable oil resources, Britain, the United States, Japan, Russia and other countries actively carry out various high-tech research on refining "tree oil". The George Forest Institute of the United States invested 4.5 million dollars to establish an experimental factory to produce "vegetable oil" from sawdust, with a conversion rate of 60%; Britain adopts new liquefaction technology, and can produce 24 kilograms of oil with 100 kilograms of trees; Russia extracts vegetable oil from sawdust, with a yield of 70%-92%; Japan uses the high technology of steam distillation to produce 20-50 tons of oil from each hectare of eucalyptus. Vigorously plant oil trees to make non-renewable resources develop in the direction of renewable resources. Trees will be our inexhaustible friends! Recently, Britain has cultivated transgenic plants resistant to strong light and high temperature. China experts also cloned the key genes of salt tolerance. The area of saline soil in China exceeds 80 million hectares, which makes a lot of land barren. Cultivating salt-tolerant crop varieties is beneficial to the development and utilization of salt wasteland. China has also discovered a "weather tree" that can predict crop yield. This tree will have buds in winter. The buds are purple and the flowers are pink. If the flowers bloom at the top of the tree, it indicates a bumper harvest of alpine crops; If the flowers bloom in the lower part, it indicates a bumper harvest at the foot of the mountain; If flowers bloom in the east, it indicates a bumper harvest of crops in the east; If flowers bloom in the west, it indicates a bumper harvest in the west. The prediction function of this "holy tree" has a history of more than 300 years. I have also seen all kinds of strange trees that eat people's rain and snow to generate electricity in books. I often lament every tree around me, lamenting that they have released the oxygen we need for the world under the light and action. In ancient China, the tree was an image. We often say that we should establish our own image. Yes, the standing of a tree is an image. Let the tree be an example for us to learn! We should learn to protect trees. Protecting trees means protecting ourselves. We should not hurt them for no reason, cut them down for no reason, and cut off their growing branches and leaves to beautify them. We should thank the trees for all they have done for us. At the same time, we should learn them. We humans, in our life, constantly consume the energy of this world. Even if you die, you should talk about ostentation and extravagance, not give yourself to the soil. I mean, there is no burial in the grave, so that our bodies naturally rot into a part of the soil. If we can give what we can to the world like a tree and give ourselves to the soil after death, our world will not be poor. If we can't give ourselves to the soil, we should at least give the rotten fruit to the soil. We should not burn the fallen leaves, but bury them in the soil. Feed something to our land, its emulsion is running dry! And our land continues to carry our new high-rise buildings and growing human beings! I once wrote such a poem "Man, the Fire Thief of Life". Let's end it here. I want to apologize to you with blood and tears. The robber took the formed blood from his mother's chest. The thief of human life ignited the warmth of winter and released the warm horse in winter. I want to apologize to you with blood and tears, and warm my bleeding mother with the fire of the sun.