Carbon dioxide emissions could fall by 150 million tons per year if coal plants are replaced by natural-gas fired combined cycle plants. That’s equal to taking some 13,000 cars off the road each year. Today natural gas is cheaper than coal and oil and with a lower emissions footprint. It seems poised to become a prime fuel for the intermediate term while we continue developing more sustainable long term fuels for the future. Read more about the Debate over Natural Gas, and Natural Gas, Electric Vehicles and Twilight of the Combustion Engine in our previous posts.