Another case of deniers getting it backwards and declaring a debate victory.

Hydro and Nuclear are close to zero CO2, emissions. Solar and Wind are very low CO2 if they are only 5 times higher, much lower than the Gas, Coal or Oil generation alternatives for new generators.

In Europe Norway has retrofitted Hydro stations to become Europe's Battery for storing Solar and Wind Power.

http://spectrum.ieee.org/green-tech/wind/norway-wants-to-be-europes-battery
Why aren't Hydro plants in BC, Ontario, and Quebec being used to store Wind and Solar power? The TVA uses Pumped Hydro Storage to store Nuclear and Coal power.

https://www.tva.gov/Energy/Our-Power-System/Hydroelectric/Raccoon-Mountain

https://thinkprogress.org/the-inside-story-of-the-worlds-biggest-battery-and-the-future-of-renewable-energy-8984e81283c#.k5mevblv6
Pumped Hydro goes back to the 1st decade of electric utilities, tried, proven technology.

https://en.wikipedia.org/wiki/Pumped-storage_hydroelectricity#History