Holy shit Al Gore’s Apocalypse will happen. Eventually Earth will no longer be able to support life due to a greenhouse effect. But don’t fret we still have at least a half billion years to work on it:
The scientists agree that we do yet know how ubiquitous or how fragile life is, but as Guinan concludes: “The Earth’s period of habitability is nearly over ― on a cosmological timescale. In a half to one billion years the Sun will start to be too luminous and warm for water to exist in liquid form on Earth, leading to a runaway greenhouse effect in less than 2 billion years“.
Somehow I doubt reducing our carbon footprint is going to help solve this problem though.