I suspect why it all happened is that emissions are invisible for the most part so it's easy to not see it as a big deal. It's just regulations getting in the

I suspect why it all happened is that emissions are invisible for the most part so it's easy to not see it as a big deal. It's just regulations getting in the way. The reality is that people's health are effected by the emissions now and for some time to come. I bet early deaths can be attributed to the extra pollution these cars put out and all of it could have been avoided.