Stop whining and fix the problem in your country first.You can repeat this all you want, they're not listening. I believe at one point Denmark recently was 100% renewable for a day. Sure, it's just a day but it proves that it's realistic.
Air quality can be improved immensely but there's a powerful lobby against it, especially in the US.
I wish the death of the internal combustion engine would arrive sooner. Think how nice many cities would be that are a poisonous hell at the moment.