There is only that much rotting close by bio wast, so I don't think natural bio gas makes a dent on the larger picture (but is nice for some use-cases without q

There is only that much rotting close by bio wast, so I don't think natural bio gas makes a dent on the larger picture (but is nice for some use-cases without question). So when Germany started subvention Bio Gas it didn't took long until people started growing stuff with the intention of having "a lot of was for bio gas" (as far as I remember). Similar, probably worse, thinks happened in some "3rd world" countries as far as I remember.