And then the brighter sun will heat up the earth, speeding up geological processes that lock up carbon in rock, until there isn’t enough carbon to sustain plant life. Well, first only C4 plants like grasses will be able to survive, then even they will die out. I read about it in the book “The life and death of planet earth”.
Hearing rumors the next Euro update will extend about this far. Should be some interesting solutions with a strong likelihood of anomalously low heights.