> have clean skies You can't have clean skies if everyone else is polluting. That is what makes pollution such a hard problem to solve. Even if USA cuts its po

> have clean skies You can't have clean skies if everyone else is polluting. That is what makes pollution such a hard problem to solve. Even if USA cuts its pollution to zero, China alone can make up the difference. But yeah, having access to this technology for everyone would be a serious game changer.