[craftyguy]

There are, but it requires sustained international cooperation at a level rarely (if ever) seen. The arbitrary flip-flopping of US policy regarding climate change mitigation isn't helping.

The closest we have come to such a feat would be outlawing of some ozone depleting chemicals 2 decades ago. It's highly unlikely we will be able to accomplish this. Any sustained international response will undoubtedly be reactionary instead of proactive.

[ForHackernews]

We're already well past the point of "proactive" responses. Everything since 400 ppm is firmly in the realm of reactionary attempts to contain and cope with the damage.