Well I do support biofuel as long as it is an effort to recycle old cooking oils (or other type of discarded organic material like dead farm animal or byproducts of processed food that is unfit for consumption or stuff like that). Growing sugarcane, corn or rapeseed for sole purpose of making biofuel is stupid.
Speaking about used cooking oil, we're now using biofuel in airliners. Kinda neat. Now if only we can convert plastic back into petroleum
https://youtu.be/Qw3EkQge8A0 