Energy Costs Comparison

By and large, renewable energy is much more expensive than traditional energy sources such as coal, natural gas, and nuclear. While it may be desirable to have more renewable energy, would a more reasonable approach to energy development be to eliminate all subsidies on energy, allowing for fair competition? And if our other goal is to have clean air, why not simply set reasonable standards on air pollutants while giving traditional energy suppliers flexibility on how to meet them instead of micromanaging the process?