Today, over 80% of American energy comes from petroleum, coal and natural gas.

But today, we already have cheap energy from coal, gas and oil.

It gets about 45 percent of its energy from coal.

Almost 90 percent of the electricity in Ohio comes from coal.

The heat from burning coal became the main source of power.

In 2011 90% of electricity came from nuclear and coal.

Converting a school from coal to either oil or gas would cost about $1 million, they said.

We get most of our energy from oil, gas, and coal.

We are not doing enough to develop clean energy from coal.

We went from coal to nuclear and now to natural gas.