You realize that the only way different types of fuels can be compared is to examine their energy content on a standard scale. Now you've got to do some calculations to help the Wolf Man make meaningful comparisons. Each pound of wood produces about 2.59 pounds of carbon dioxide. Rank-order the fuels according the amount of CO2 they produce per MBTU's. Explain the list to Wolf Man and make some recommendations on the kinds of fuels he should buy.
Some fuels are better suited to certain tasks than others.
For example it only takes 8 gallons of gasoline to produce a MBTU's but it takes 125 pounds of wood to produce the same amount of energy. Each pound of wood produces about 2.59 pounds of carbon dioxide. You can buy this resource on CD-ROM for use on computers without internet access.