In the race to stop climate change, scientists will explore all kinds of ideas, Even those that are similar to science fiction.
One of them is a proposed by the Harvard group, who is proposing to launch a 2019 test that they aim to use to improve their method reducing the amount of sunlight entering the Earth.
The concept is very simple: Create a shield of defenses in the atmosphere that will avoid the sun's radiation back into space.
It would be like polarize the glass car or sunrise to go to the beach, but in the atmosphere.
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There are many challenges in using the exams for use and, for Some, dangers that could do this can help strengthen the global warming problem.
Indeed, he has a name, at least, to disturb him: "Controlled stratospheric turbulence test" or SCoPEx, as they say it in English.
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The SCoPEx is based on a branch of study called gworld solar, The which specializes in a & # 39; Find ways to close or stimulate sunlight who reaches our planet.
So far, experts are based on their solar geoscience checks on computer symbols, but SCoPEx wants to get data real world.
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For this, planning to launch a ball that rises about 20 kilometers high with high calcium carbonate, Very common mineral powder used in products such as concrete, wild boots, mixing cakes or pills to calm dishes.
Whenever the balne is replaced, it scattered the dust in the atmosphere create "great air", which reached about one kilometer of length, according to the definition of Harvard scientists.
This test allows you to look at changes in the chemical composition of the atmosphere and how it affects the division of light.
SCoPex researchers warned that the space of exams is very small. That is, they are not yet at the level of the development of geological technology, just They are in an examinative step to better understand how the items are carrying on the air.
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In any case, the concept of SCoPEx could be served In the future, planes will be used that scatters small fragments in the stratosphere that is used; represents the ray of the sun.
According to an article published by Nature magazine, some estimates suggest that this method could be reduced near 1.5ºC
Inside the community too there is a ban on the efficiency and convenience of solar geo-business.
"By disabling a & # 39; plan to keep longer, which will help its & # 39; crop grow better. But plants also need sunlight to grow, so sunlight can have an impact on the growth, "explains Jonathan Proctor, researcher at the Department of Agriculture at the University of California, Berkeley in the recent survey.
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"For agriculture, the effects of solar geology do not necessarily match the size to the benefits. "
Another danger is that the pattern of water can change, which would cause more drying in some areas.
But for some experts, the biggest risk of solar engineering attract attention of the real problem.
"Geoengineering in general is still at a very early stage of development and It should never be considered as a reasonable option to determine our energy systems and our economy, "said Harry McCaughey, a professor of genetics at Queens University in Canada, to BBC World.
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"The Paris Agreement is a real challenge and the world will provide a more sustainable location of the need to lower levels of carbon dioxide and other greenhouse gases. "
Similarly, Alan Robock, a professor in the Department of Environmental Sciences at Rutgers University, thought.
"Illusion is a way of tackling climate change", says Robock to BBC World." Stop using the atmosphere like a sewage for our greenhouse gas emissions. "
"If geoengineering is accomplished in the future, it will usually be a spread it will only be useful if it is used for a short time to minimize the effects of major climate change, long as we are & # 39; strive to stop emissions and eliminate carbon dioxide from the atmosphere, "he said. Robock.