If we carry on, business as usual, not making the carbon and environmental targets within the timespan  scientists tell us we must act withi, then all is not lost.  There is another nearby planet we can start all over again on according to the National Geographic Website

 ‘Lunar Ark’ Proposed  August 14, 2007

The moon should be developed as a sanctuary for civilization in case of a cataclysmic cosmic impact, according to an international team of experts.

NASA already has blueprints to create a permanent lunar outpost by the 2020s

Only local labour and material resources to be used?

Expressions of interest for the design, construction and facilities management are invited.