In the year 2006, the U.S. consumed approximately one billion tons of coal.  Each ton of coal produces 20 GJ (gigajoules of energy).  How much energy was actually put to work?

A. 16%
B. 59%
C. 84%
D. 29%


Answer: A

Environmental & Atmospheric Sciences

You might also like to view...

What were some of the reasons why the Russian government decided to sell all of its North American territory to the United States in the 1840s?

What will be an ideal response?

Environmental & Atmospheric Sciences

Permafrost lies beneath ____% of the land surface on Earth

a. 0 b. 10 c. 20 d. 40 e. 50

Environmental & Atmospheric Sciences

Discuss the environmental economic research of Robert Constanza

What will be an ideal response?

Environmental & Atmospheric Sciences

Thick, spongy mats of low-growing plants, primarily grasses, mosses, and lichens, are typical of the ____.

A. arctic tundra B. coniferous forests C. tall-grass prairies D. tropical forests E. taiga

Environmental & Atmospheric Sciences