[GOONIMMUNE]

> All we have to do is send up hella reflectors to block the sun and we can be cool again.

The amount of reflectors required would necessitate literally millions of conventional rocket launches. At 1 launch per day it comes out to thousands of years to accomplish a project like this- far too slow to effectively address climate change.

[Johnjonjoan]

We don't need to block all of it or anywhere near. We have hundreds of years to do this, why wouldn't we make them in space?

If you read my comment you would realise I didn't say we could use it to address climate change but that climate change would never become catastrophic (read runaway greenhouse effect) because we could do it as a last resort.