He anticipates that Consol will send about six million metric tons of this type of coal to China next year.

FORBES: Chinese Coke Craze Kicks Up Business For Consol

The market soon found another solution for glassmaking, a new type of coal furnace, patented in 1611 by Edward Zouch.

FORBES: Magazine Article

The final rule sets a variety of targets depending on the type of plant and the type of coal it burns.

NPR: E.P.A Proposes New Rules on Haze

On average (depending on the type of coal used) 1 kWh produces 1.4 pounds of CO2 which would mean a 25-mile journey using 5 kWh would emit around 7 pounds of CO2 compared to your average vehicles emitting 22 pounds of C02.

CNN: All About: Greener driving

American demand for this type of metallurgical coal has been relatively weak recently, says Macquarie analyst Curt Woodworth.

FORBES: Chinese Coke Craze Kicks Up Business For Consol

By type of energy: coal 11 percent, oil 53 percent, gas 9 percent, and electricity and other 28 percent.

FORBES: Japan's Energy Dependence

One obvious way for firms in the power sector to reduce their emissions is to switch the type of energy they use, for example from inefficient coal-fired power stations to efficient gas stations.

BBC: Switching from high to low carbon energy is a challenge