Which is why instead of looking for ways to better the environment which is already on a downhill spiral, we need to look to adapting by indoor or artificial growth. Even an indoor farm using glass as a way to let sun in will work as well. You can keep indoors climate controlled.
To be honest, I wasn’t thinking about the animals, I skipped over that in his tweet. But unlike plants, animals are resilient, I don’t see a 20% loss in animal life on 3.6 degree increase not in Fahrenheit at least. If we’re talking Celsius then we may have an issue.