1.

Wood pellets are produced from the waste sawdust of lumber and paper mills. Home-heating stoves burning these pellets can heat homes directly, instead of relying on other energy sources. Heating your home with wood pellets is:

A.  sustainable, less polluting, and about 3 times as efficient as heating a home using electricity from a coal-fired power plant.
B.  sustainable, slightly more polluting, and is about 30% more efficient than using electricity from a coal-fired power plant.
C.  not sustainable but is less polluting and is about as efficient as using electricity from a coal-fired power plant.
D.  not sustainable and actually pollutes more than using electricity from a coal-fired power plant.
Answer» B.  sustainable, slightly more polluting, and is about 30% more efficient than using electricity from a coal-fired power plant.


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