Scientists are working on energy sources that leave no soot and cool the planet.

In theory, injecting aerosols into the stratosphere could cool the planet at a cost of disrupting seasonal weather patterns, leading to widespread flooding or drought.

So scientists are looking at other ways to cool the planet.

Even the knowledge that we could cool the planet with aerosols, some argue, would remove the incentive to decarbonize.

Then again, some scientists are proposing other oversized solutions to climate change, such as putting giant mirrors in space to cool the planet by reflecting sunlight.