Everything we know at what ever level exists as bubbles. Lets go to space. We have earth with his space-bubble, that goes on to the most outward regions around earth, high orbit i think it is called. To me everything inside that high-level orbit is part of earth. So if we are planning to clean up earth it should contain these regions in space as well. Then we have the moon with his space-bubble. If we go a level higher then we have our sun with its solar-bubble and then as last local bubble we have the heliosphere as the bubble from our entire solar-system.
We could even use this bubble vision in other things such as goals or subjects with their saving overlapping called buffers. Earth has great examples of buffering especially in nature and life. It is a way of surviving. To much or to little from everything can be used as an over-bridging in between extremes or as solutions to problems.
I think we should place that in our mind and take it into space. Buffering water, oxygen, food, fuel, materials, etc. would be a good start for the long run. Also as Igor stated a backup from earths life in space could be part of that, maybe as physical DNA-bank or with 3D-printing-DNA-techniecs.
In psychology we could use it also. Being open minded places a bubble in between left and right with open buffers to left and right. I guess that is called diplomatic or solution-oriented thinking.