The greenhouse effect caused by carbon dioxide has been 200 years of history, the human carried out to reduce carbon dioxide emissions, to curb global warming efforts have never stopped, but it did not play a turn the tide Role, into the atmosphere of carbon dioxide is still increasing. According to statistics, before the industrial revolution, the earth's atmospheric carbon dioxide concentration of 280ppm. When the human began to use fossil fuels, the earth's carbon dioxide content began to rise to the late 50s of last century, the earth's carbon dioxide content has reached 315ppm, and now is as high as 380ppm, now no matter what we approach, the trend of global warming Difficult to stop, because the release of excess heat in the atmosphere and its impact on the Earth's climate need to go through a very long time and process to complete.
In the face of this grim situation, all mankind can do is to do everything possible to reduce carbon dioxide emissions, as far as possible to curb this harm, to prevent the situation completely out of control, scientists have indeed racked their brains, With the experiment, based on carbon sequestration technology of tree planting tree program because of great feasibility and by scientists of all ages.
The so-called carbon sequestration technology refers to the implementation of the capture of carbon dioxide, by processing it safely buried underground or transported to the deep-sea to be a storage technology, is considered a fundamental solution to the problem of carbon dioxide emissions, one of the ways subject to extensive Of the attention.
A large number of tree species to reduce carbon dioxide emissions has been recognized as an excellent choice, but a recent study found that a large number of trees is not absolutely effective, because when the carbon dioxide reaches a certain concentration, but will slow down the plant Photosynthesis. Fritz Schultz and Ulrich Hasser, two scientists from the University of Grafwald, Germany, have recently suggested that forests are intentionally planted in countries and regions suitable for forest growth and landfill sites, To fix the carbon dioxide, and then take a permanent way to bury this part of the carbon from the global carbon cycle out. The key to doing this is not to let the carbon dioxide has been fixed down again, must be so that plants in the biomass can naturally 'disappear'. The approach is to use the soil immediately after the tree is buried, burial sites can be open lignite or other surface mines, the purpose is to make trees and air isolation and thus for a long time will not corrupt change, perhaps the future of these Trees can also have value in use. It is tentatively estimated that, to secure some 32 billion tons of carbon dioxide emitted annually worldwide, about 1 billion hectares of forest will be planted, and that additional petrol and electricity taxes can be levied to support the extra charge per liter of petrol About 0.11 euros per kilowatt-hour electricity can be received more than 0.003 euros. Other countries and regions that are primarily consuming fossil fuels will pay for carbon credits, and the resulting global deal will benefit all.
Not long ago, at the US Woods Hole Institute of Marine Research held an expert meeting, scientists have proposed the idea of the construction of marine forests. They believe that large amounts of plankton and algae in the oceans can absorb carbon dioxide, they will carry the absorption of carbon dioxide after sinking into the sea, if such plankton and algae more and more prosperous, can absorb more carbon dioxide. US scientists have begun experiments in this area, they will be several tons of soluble iron compounds into the sea to promote the growth of plankton in the ocean, several pilot projects are also underway. Of course, whether this will create new pollution to the ocean, the impact of the marine ecological environment, such as how much a series of issues should be scientific proof.
In short, due to the deterioration of the terrestrial ecological environment, the large area of forest extinction, resulting in 20% of carbon emissions in the atmosphere is an indisputable fact, so the surface of the earth vegetation is not too much but too little in some areas and even To the point where the devastation, the existing vegetation cannot meet the need to reduce global warming to reduce carbon dioxide. Now some scientists have also proposed another surprising alternative based on carbon sequestration technology: artificial trees. These trees do not grow, nor do they bloom long leaves, but can absorb carbon dioxide without burial. The idea was put forward by Klaus Lackner of Columbia University in the United States, where he estimates that an artificial tree can absorb 90,000 tons of carbon dioxide a year, equivalent to 15,000 cars a year, and its ability to absorb carbon dioxide is Natural trees 1000 times. There is also disagreement about this option, which they argue is not worth the effort because the energy harvested by man-made trees to capture carbon dioxide is high.