Scientists propose an unproven way to tackle climate change. They are proposing spraying sun-dimming chemicals into the Earth's atmosphere.
This technique, known as stratospheric aerosol injection, (SAI) that could cut the rate of global warming in half, scientists say.
Scientists at Harvard and Yale universities led the research, and also <a href="http://iopscience.iop.org/article/10.1088/1748-9326/aae98d"> published it </a> in the journal Environmental Research Letters.
The research concludes with spraying large amounts of sulfate particles into the Earth's lower stratosphere at altitudes as high as 12 miles.
The scientists say they will deliver the sulfates with specially designed high-altitude aircraft, balloons or large naval-style guns.
They conclude that no other existing aircraft have the combination of altitude and payload capabilities required for the mission, leading them instead to the design of a new plane. The team says the system could be created in approximately 15 years.
They say they are 'developing a new, purpose-built tanker with 'substantial payload capabilities' and would neither be 'technologically difficult nor prohibitively expensive.'
‘Total pre-start costs to launch a hypothetical SAI effort 15 years from now are ~$3.5 billion in 2018 US $. A program that would deploy 0.2 Mt of SO2 in year 1 and ramp up linearly thereafter at 0.2 Mt SO2/yr would require average annual operating costs of ~$2.25 billion/yr over 15 years. While these figures include all development and direct operating costs, they do not include any indirect costs such as for monitoring and measuring the impacts of SAI deployment.’
'We make no judgment about the desirability of SAI,' the report states.
'We simply show that a hypothetical deployment program commencing 15 years hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective. It would also be remarkably inexpensive.'
The scientists do acknowledge there would be extreme risks with the hypothetical system.
Coordination between multiple countries in both hemispheres would be required.
They also say the SAI techniques could jeopardize agriculture, lead to droughts or cause extreme weather.
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<b>By: Lexy </b>
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