Critics say proposed system similar to carbon tax Ford government is opposing.
Intended to incentivize industries to reduce emissions; facilities below a set level of emissions rewarded.
Wynne government says the March 22 auction brought in $472 million.
Canada’s largest union concerned about workers it represents among 30 of the 150 largest emitters.
A CEC report has found that Canada’s fossil fuel-powered generating plants average higher greenhouse gas emissions for the same amount of electricity than American or Mexican stations.