Plants can convert carbon dioxide in the atmosphere into carbohydrates through photosynthesis and fix them in plants or soil in the form of organic carbon. Biological carbon fixation is to improve the carbon absorption and storage capacity of ecosystem by using photosynthesis of plants, thus reducing the concentration of carbon dioxide in the atmosphere and slowing down the global warming trend.
Tropical rain forest covers an area of 5.3 million square kilometers and is an important link in the global carbon cycle. It has 65,438+07% of the global terrestrial vegetation carbon storage, and its carbon sequestration exceeds that of other terrestrial ecosystems. In addition, an independent study shows that global forest carbon emissions may be underestimated, because felled trees will decompose and emit a lot of carbon dioxide.
Greenhouse gas emissions from forestry, agriculture and land use change account for almost a quarter of human activities. A new study based on the data of 32 1 forest observation stations shows that the death rate of trees is increasing: about 1 1 tree is lost per hectare every year, while 1985 loses 7 trees. At the same time, the giant tree, which was originally dominant because of its height, is also exhausted in the face of the increasingly severe drought test brought about by global warming. The consequences are very serious. Compared with11990s, the carbon dioxide absorption capacity of virgin forests has decreased by 30%. So some people say that oxygen comes from algae, regardless of this view of destroying forests, they simply don't understand what climate change means, so we should pay more attention to the environment and forests.