Scientists have started to propose an inventive method, which is not yet proved, as a way to tackle the matter of climate change. The method is by spraying chemicals to dim the intensity of sun into the atmosphere of our planet. The scientists of Harvard and Yale Universities have conducted a research where they have proposed this unique technique known as Stratospheric Aerosol Injection. They say that this could indeed reduce the rate of global warming to half. The technique would basically involve spraying up large amounts of sulfate particles into the lower stratosphere of the Earth at a high altitude of 12 miles. The scientists have proposed to deliver the sulfates with an aircraft of high altitude, which is specially designed, along with balloons or huge naval-type guns. Their estimate suggests that the total cost of launching this over a period of 15 years will be nearly $3.5 billion. The running cost is supposed to be $2.25 billion per year during the same time frame.
The report, though acknowledges that the technique is totally hypothetical in nature. It even says that the scientists do not make any kind of judgment related to the want for Stratospheric Aerosol Injection. From an engineering point of view, it could indeed be technically possible to implement. Moreover, this will be extremely inexpensive. Despite the benefits, the researchers do acknowledge the potential risks that it carries. The risks include, proper connection between countries in both the hemispheres would be needed and the injection techniques could even cause harm to the crop yields. This, in turn, would lead to droughts or cause extreme weather conditions.
One expert in the economics of climate change believes that solar radiation management is indeed a much worse solution compared to emissions of greenhouse gases as it is more costly and also much riskier in the long run. David Archer, in the Department of Geophysical Science at the University of Chicago, said that trying to engineer the climate in this manner has got a problem. It is only a temporary way to cover up the problem, which will continue to exist forever. He believes that it will take thousands of years for the fossil fuel carbon-dioxide to ultimately go away permanently.
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