If you look at the World Commission on Dams, their report on hydro power that Greenpeace uses to guide our support or opposition to particular dams, it really depends on how it's done. Run of river is clearly the most environmentally friendly and can produce lots of power. The massive dams that create large reservoirs create greenhouse gas emissions of their own with the rotting of vegetation, etc. They also have all sorts of dislocations. Also, any project we do has to be consistent with Canada's commitment to reconciliation with indigenous people. It's that combination of factors.
Mega-dams have a bunch of other ecological problems. They don't provide the greenhouse gas benefit because of the problem that they produce greenhouse gas emissions as the ground that was there rots and turns into methane. Opposition from affected first nations is.... We say there are a lot of better opportunities in B.C. for doing renewable generation in a way that doesn't run into those problems.