USA — Scientists from Harvard and Yale analyzed the possibility of 'dimming the sun' to battle climate change. <br /><br />If this sounds like it's straight out of a sci-fi movie, it's because it's not real … yet.<br /><br />Fleets of specially designed aircrafts would fly roughly 20 kilometers above ground in the lower stratosphere.<br /><br />Once there the planes would spray tiny sulphate particulates to block sunlight in a process that is known as stratospheric aerosol injection.<br /><br />According to their study, published in the journal Environmental Research letters, this technique could cut the rate of global warming in half.<br /><br />Researchers who participated in the study state it would be a "remarkably inexpensive" process costing around $2 bn to $2.5 bn a year.<br /><br />CNN reported the plan doesn't cover greenhouse gas emissions and could have negative consequences such as extreme shifts in weather and endangering crop yields. <br /><br />It's important to note that the engineers behind this are not suggesting this is the ultimate solution to climate change, but just wanted to estimate technology costs of stratospheric aerosol injection.
