Assume it is the year one billion

[james_davis_nicoll]

How can one maintain the Earth's ability to support complex life?

Comments

[mikeda]

A society wth really advanced tech might be able to somehow drop the sun’s brightness back down enough to keep the earth from overheating. Although any society capable of doing that eould probably also have the alternative (suggested above) of moving the Esrth to a more distant orbit.

[(Anonymous)]

Reducing the sun's mass would reduce the brightness (and extend the sun's main sequence lifetime). But I don't have a proposal to offer as to how that could be achieved.