I just don't see the point in worrying. Realistically, I think most people in modern countries are too comfortable as they are and woke make any changes. What will be will be, won't it?
I think I've done my bit by having 1 DC. No more. I wouldn't hesitate to abort any additional pregnancies, regardless of details.
I also only run the one car. Sorry, not giving that up.
And not giving up my cheap all inclusive holidays either 
But I eat mostly plant based (DH is vegan). AIBU to think I've done a good bit?
We recycle too.