The only truly green energy is the energy you don't use. All electric is dirty to some degree. Hyrdo is cleaner than almost anything else, but not a clean as not using it at all. On top of that "clean" is not a very well defined metric. Carbon emissions are not the only thing to consider.

The exclusion of hydro from "green" is of tactical nature. It's mature technology and without spectacular learning curves.

Really? That seems dumb. Have any references for why they made this decision?