User blog comment:Craiglpalmer/Global Goals: Why We're Telling Everyone/@comment-5650937-20150925135144/@comment-5558012-20150925173855

First things first, climate doesn't affect gravity. As long as there's mass (ie. Earth), gravity's not going anywhere.

Mass extinction events aren't new. The climate has changed in the past and if it triggers another mass extinction maybe humans can go extinct and the Earth will be just fine again. Unless we enter a positive feedback loop and the Earth never cools again like some believe happened to Venus.