Scientists from Yale and Harvard Universities have proposed a new way of handling the global warming issue. The new proposal explores possibilities of spraying Sun-dimming chemicals in the stratosphere.
The technique is called Stratospheric Aerosol Injection aka SAI. Scientists believe that this technique would slow down the rate of global warming by 50%. The overall ideal is to spray large amount of sulphate particles into lower stratosphere, about ~19.3 kilometers above Earth's surface.
There are several challenges involved, as you'd imagine. None of the existing aircraft designs allow making this possible - mentioned the paper published in the Environment Research Letters journal.
Scientists have therefore proposed development of a high-altitude tanker with substantial payload capabilities to deliver the sulphates at the desired altitude.
The estimated cost of this project would be $2.25 billion and the time required would be about 15 years.
The report however acknowledges that the technique is hypothetical.