Edwin Pawlowski wrote:
"DJ" wrote in message
hy·dro·e·lec·tric ( P ) Pronunciation Key (hdr--lktrk)
adj.
Generating electricity by conversion of the energy of running water.
Of, relating to, or using electricity so generated.

Yeah, but I bet those rivers are running on burning coal.

No, I believe rivers run on solar energy. It's part of that big
thermal-evaporation-precipitation cycle.