Editing CW9:8892

1) What is a common disadvantage of switching to clean fuels for vehicles? 
      vehicles would cost more to produce
2) What is the most overwhelming common advantage of switching to clean fuels? 
       Less pollution or hydrocarbons
3) Does this article really answer whether clean fuels are feasible? No talks about how to it reduce pollution and how it is better than gasoline but not about it being carried out.



4) List the fuels on the Comparison chart by octane rating, from lowest to highest: 

5) Which alternative fuel has the most diversity to date for types of vehicles? 

6) Rank the all the fuels on the chart by their energy content from highest to lowest: 

7) Gaging by the chart, what seems to be the safest fuel? 

8) Do you have any way of gaging whether this chart was accurate or not? How would you go about finding out if it is true or not?