Seams to me that the market it the only way we can slow global warning down. Its companys like Tesla that make a diffrence not some goverment that tries to regulate existing stuff.
The have neither the insentive nor the knowlage to do so.
Electric cars, solar cells are the things that will change the world, not goverment regulation.
engine type doesn't matter much, what matters is energy storage for use in that engine. batteries aren't even in the same order of magnitude of both energy density (energy per liter) and specific energy (energy per kg) compared to liquid hydrocarbon fuel and that's the problem that needs solving. tesla currently gets away with it by placing batteries in clever ways, but it's still inferior to plain old gas in multiple areas (recharge speed, maximum range, mass, etc.)
what's that got to do with the market? without pricing gas correctly, electric will always be inferior. technology can only help so much - it's a question of fundamental physics of chemical bonds.
Electirc cars are better in some respects. Nonreusable energy will get more expensive while reusable energy will get better.
The market will figure out if electirc cars are a workable, maybe it want work. Maybe we should have hydrogen cars or maybe something else. Maybe we just have to live with it, use all the oil and only then we will stop. Sure you can add a carbon tax or something but that will at most drag things out (or maybe make the adoption of diffrent cars faster).
Fundamentally the way we will live and how we will produce energy will be guided by markets.
The have neither the insentive nor the knowlage to do so.
Electric cars, solar cells are the things that will change the world, not goverment regulation.