I agree.
#2. Sounds good, but two things concern me. First, used cooking oil is a great fuel... for now, because not many people use it. Now think of 50% of the people in a city using it; they won't be able to make enough deep fried doughnuts and french fries fast enough to power them. Plus, by running that fuel on public roads, you COULD be prosecuted for fuel tax evasion since you didn't pay it on the bio-grease.
#3. Looking around my office, a LOT of people could stand to walk more, even if it is 25 miles to work.

Planning out your trips and doing more efficient driving is not a bad thing.