The year is 2050. Your country is facing an unprecedented wave of climate refugees from Africa and Asia. Everyone knows that accommodating all of them would be completely unsustainable and would result in the same ruin for your country as befell their countries of origin. Yet human decency dictates that you let them in.
What does your country do? Does it prioritize human rights and values over its duty to its own citizens? Or does it reinforce its borders and turn the flood of refugees away?
As a bonus question:
Everyone knew that this would happen. Yet India and China, as Putin noted, prioritized raw economic growth over sustainable development. Do people from those countries deserve a second chance even though they were some of the prime agents of manmade climate change?
I think climate-conscientious people should totally be let in. But it would require very strict vetting at the border and many bleeding-heart liberals would be uncomfortable with it. But the alternative is much, much worse.