Age, sex, location (just for demographic stats).
What form of biofuel do you use?
Why do you use it?
Do you think it is more about conservation, economics, or environmental protection?
Do you think that mass usage of biofuels is economically plausible?
What form of biofuel do you use?
Why do you use it?
Do you think it is more about conservation, economics, or environmental protection?
Do you think that mass usage of biofuels is economically plausible?