First, politics will never allow it. Look at the political environment in US, Great Britain...

Then when regulation is put in place, it isn't effective. Loop holes, grand-fathering, unintended consequences, incompetent gov't agencies.

And then even if one country goes green, it won't help if the rest of the world is spewing air pollution and dumping plastic into the oceans.

The probability of all this getting aligned to make regulation effective is zero.