We don't have a carbon tax in the US and we don't have requirements for carbon sequestration systems. Yet, the coal industry is still contracting. Now you cou

We don't have a carbon tax in the US and we don't have requirements for carbon sequestration systems. Yet, the coal industry is still contracting. Now you could remove the regulations that require limiting emissions of things like mercury and NOX and SOX and it would make coal cheaper. But people really don't like acid rain or mercury in their water. Coal is already phasing out and it's because natural gas is cheap and renewables are getting cheaper every year.