The overwhelming vast majority don't care. From poor 3rd world people making babies to billionaires claiming that climate change is a hoax to religious leaders insisting that what matters is heaven, not earth...There are many scientists and environmentalists working on those problems. Yes, many do not care. On the other hand, when the adversity is at your door, there comes a time when one must address it because it hurts too badly to ignore.
The list is endless.
Tom