(It's sometimes called solar radiation modification or solar geoengineering.)
But it's potentially important, it could be very, very helpful, it could be disastrous," Stone told CNBC.
And so it goes for solar geoengineering," Stone said.
Everyone perceives it to be controversial," Camilloni told CNBC.
"This is no one's Plan A for how you deal with climate risk, and whatever happens, we have to cut our emissions," Stone told CNBC.