Some of these were based on provincial regulations and some were based on federal regulations. For example, in 2006 Alberta came up with a framework for electricity, and that was translated by the federal government into a mercury reduction. That basically led to a reduction from 2,600 kilograms of mercury emissions to, right now, in the range of about 666 kilograms. That was one approach.
The other approach, in terms of electricity and greenhouse gases, was the introduction of the provincial programs, the gas-emitter regulations in Alberta or other provinces, including greenhouse gas measures. As well, the shift in generation from a coal base to a natural gas base led to these reductions.