Kentucky Fried Movie / Alternative Energy

Watched Kentucky Fried Movie again recently, it has a funny/prescient bit about alternative energy that floored me. It was made in the late 70s, and one of their suggested ideas essentially came true! -- a bit about collecting oil that drips off of fast food and using that as oil; an alternative take on biodiesel. Even their untried-as-yet ideas don't seem thaaaaaat far fetched today: collecting the oil that clogs pores on teenagers faces, collecting oil stuck in combs, and collecting anthropogenic methane emissions from eating fast food (that's a euphemism...) Methane is a huge green house gas, a couple of people in the lab study it in that regard, methane from feed lots is a specific concern. It certainly seems that harvesting it and burning it would be better than letting it go up into the atmosphere unimpeded.