人間の排泄物の燃料化

下記の記事が出ている。

　Biofuel made from human excrement has become easier to produce
　ars technica: December 7, 2016
　http://arstechnica.com/science/2016/12/in-the-future-humans-could-help-make-gallons-of-sewage-based-biofuel-a-year/