>>6151759I believe some heat already radiates from earth into space. The atmosphere traps some, otherwise if the atmosphere trapped it all and heat couldn't escape, you end up like Venus where it's hot as fuck. It's also why the earth cools at night; if one side of the earth was always in night, it would get pretty damn cold.
So you need a way to have earth's atmosphere to trap less heat, and reflect more heat out into space. Not sure how you do that. I know water vapor in the atmosphere traps a lot of heat, much more than CO2 does, so maybe if you could reduce humidity in the atmosphere. But I don't see how you could do that. Or if you could make the ocean surface white instead of dark blue, that might reflect more heat out into space.
