Scientists emit chemicals into the atmosphere to stop global warming

NASA Photo

(CNN) – Scientists propose a simpler but still untargeted way of dealing with climate change: integrating the sun's chemical illumination into the Earth's environment.

An investigation by scientists from Harvard and Yale University, published in Environmental Research Letters, has suggested using a technique called Stratospheric Aerosol (SAI) technique to cut the average global warming rate by half.

This technique would lead to the proliferation of large amounts of sulfate particles, at an altitude of at least 12 kilometers in the Earth's stratosphere. Scientists have specially designed high altitude airliner designed for sulphate, balloons or large ship types.

Although currently undeveloped technologies and non-adaptive aircrafts, the researchers have said, "developing a new type of contained capacity and useful end-to-end capabilities would not be technologically difficult or prohibitively expensive."

They calculate the cost of launching the hypothetical system of the farm for 15 years, approximately $ 3,500 million, the annual cost of $ 15 million for 25 years.

However, the report acknowledges that the technique is completely hypothetical right now.

"It is believed that we do not judge judgments," says the report. "We have been operating for 15 years due to a hypothetical expansion program, although highly uncertain and ambitious, it would be technically possible from the engineering point of view, and it would be very cheap."

Likewise, they should recognize potential risks, coordination between the two hemispheric countries would be necessary, and SAI techniques would pose a risk of crop yields, resulting in drought or extreme weather.

The proposals also do not increase greenhouse gas emissions, which is the main cause of global warming.

And while convinced of the main authors of the report, other experts were skeptical.

"From the point of view of the climate economy, solar radiation management is still much worse than greenhouse gas emissions: it's more expensive and more dangerous in the long run," said Philippe Thalmann, École Polytechnique Fédérale de Lausanne, Climate Change Economics, CNN.