It becomes the cost of doing dirty business. Solar is taking off not because we banned coal, but because it's cheaper than coal. If coal and natural gas were t

It becomes the cost of doing dirty business. Solar is taking off not because we banned coal, but because it's cheaper than coal. If coal and natural gas were taxed according to their carbon output, solar would be even more ahead, nuclear may become more attractive as well. Aluminum is heavily recycled not because it's green, but because it's significantly cheaper than mining new. Incentives work. The free market responds to incentives, and works around regulations.