I'd like to think there's some consilience between idealism in social
policy and idealism in environmental policy. Of course, there are
obviously limits - there are ultimate limits to how many immigrants
our country (or any country) can absorb in an ecological sense. But
we are still the richest country on earth, and we should try to take
"some" immigrants, because that's an im****tant part of our history and
tradition. In other words, we should try to do both - to a degree and
for a while, at least. We haven't reached the end yet.
And yes, multiculturalism and biodiversity can be seen as
complementary.