Americans don't pay much attention to environmental issues because they aren't sexy. I mean cleaning up coal plants and reining in outlaw frackers is hugely important work but it doesn't get anybody's pulse racing.
Like it or not in the end it's one's body. It's literally what carries you through life. There's a reason for the saying 'If you have your health you have everything ' and it's true. Old age disease - these are the great equalizers.