In order to fight global warming, scientists in Scotland now suggested, the world solutions - in the space of a huge dust cloud, launch asteroids, it will be like a earth visor.
The world is warming climate change. Although a lot of people hope to reduce absorbs heat from the sun's greenhouse gas emissions, to prevent these changes, some controversial proposal review control large engineering project, are usually called earth engineering the climate of the earth.
And are not aimed at sea or the atmosphere climate change, some researchers suggest that affect the whole earth from space the earth project. For example, 1.7%, reduce the solar radiation of the earth's receiving project may be the impact of the global temperature rise 3.6 degrees Fahrenheit (2 degrees Celsius). The u.n. intergovernmental panel on climate change (IPCC) climate model show that by the end of the century, the average global temperature may rise by 2 to 11.5 degrees Fahrenheit (1.1 to 6.4 degrees Celsius).
"1.7% reduction is very small, almost won't appear obvious on earth, of the university of Strathclyde in Scotland space scientists, researchers say:" Russell than Iraq grams. "Sometimes people will block the sun giant screen play idea. This is such a... [equipment] is constantly in between the sun and the earth, its action is only a very light shadow or filter".
Shading the earth
Suggestions from the sun to earth keep out huge mirror space. This concept's main problem is the need to build and launch such reflection, or in space to build their huge cost and energy costs - the current launched into low earth orbit to the object of thousands of dollars per pound. Another method is to use a blanket of dust cover the sun, as for the earth do cloud. These provides the advantages of simple, compared to a mirror, but with the passage of time operation risk, scattered by the sun radiation and the sun's gravity, the moon and the planets. [the ten most crazy the conception of environmental protection]
Now is not itself a floating in space of dust cloud, researchers think that asteroids can basically space to keep out sunshine, cooling the earth gravity anchored dust cloud.
"I want to clear, I will never Suggestions to reduce our carbon emissions in place of the earth's project", more than the g told LiveScience. On the contrary, he said, "we can buy time to find a permanent solution to crack down on the earth's climate change. Dust cloud is not effect a permanent cure, but it can counteract the effects of climate change for a given time to let sluggish measures such as carbon capture effect."
The idea is to put an asteroid in the Lagrangian point L1, a web site, in the sun and the earth's gravity offset the. This is four times the left and right sides, the distance from the earth to the moon.
Researchers think that an asteroid outfitting "and" big capacity drive, equipment by electromagnet, throwing distance huge rock asteroid source sex up of matter. Quality driver can at the same time as a rocket to promote the asteroid's L1 point and engine extrusive sun shielding dust. [5 big reason to care about asteroids]
The researchers calculated, the biggest near-earth asteroids, 1036 Ganymed, can keep large enough to stop 6.58% of solar radiation, usually arrive on earth, enough to strike any current global warming trend of the dust cloud. This cloud, will be about 1.1 billion pounds (500 million kg), in the quality and wide about 1600 miles (2600 kilometers).
Ganymed have a quality is about 28.6 billion pounds. (13 billion kg). The scale of the asteroid may let a person association, but, "and not destroy the earth, it can be used to help human disaster movies, such as" Armageddon ", "than the g said.
The asteroid dust challenge
The main challenge of this proposal will promote the size of the asteroid Ganymed sun - the earth L1 point.
"Earth resources recently announced that they are going to mine asteroids, than the g said." "The study, their base, their plan estimated that will likely catch asteroid belt quality, to 2025 for 500000 kg (1.1 million lb). Compare this to Ganymed quality makes capture it seems to be not done task, however, at least in the long long of everything, in addition to more small asteroids may move and gathered in the first Lagrangian point".
Security is another question.
Than the g said: "a very large asteroids is a potential threat to the earth, and therefore great care and test will need to implement this kind of circumstance,". "Because of this reason, political challenge might scale matching engineering challenge, even capture more small asteroids, might be from social each field of reserved, but the risk will be a lot less."
In addition, is there any way that these dust cloud on a large scale comprehensive test to verify its validity before carrying out, "things are common to all of earth project plan," than the g said. "In the global scope, it is not possible to test, because test will in essence is a real thing, except maybe diluted form. Climate models can be, but without some large-scale test, and from these the model results can not be fully verified."
However, if GeoEngineers company didn't use asteroids, produce cloud, they can greatly reduce how much dust project spurt "any catastrophic climate response was observed," than the g said, "with the passage of time the scattered cloud natural."
Scientists will detailed introduce their research results on November 12, issue of the journal research progress in space.




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