Cheap source of gas

I've been thinking about that problem and it occurred to me that people throw away tons of waste all the time.  This waste can be used as an energy source, provided that someone finds a way to do it.  The same is true on the farm.  Inasmuch as there is plenty of hydrogen in this waste, it seems that there should be a way to harvest it and use it to make ammonia as described in an earlier post.