Bloomberg: Ontario recently announced plans to address climate change. Canada's most populous province thus joins a trend: Where national governments fail to act, states and cities are stepping up. Is that a good thing? It depends.
Climate change is a global problem that will ultimately require coordinated international action. Well-designed plans on a smaller scale can make a difference, partly by setting an example for others to follow; Ontario's plan follows that of Quebec and 10 U.S. states. Badly designed...