The challenge has always been, and still is, to avoid actions that do more harm than good. "Action" that makes the situation worse is no solution. Mainstream estimates of the social damages of CO2 emissions imply that policies should not cost more than about US$50 per tonne of emissions for at least another decade. Many of the policies Canada has pursued ended up costing hundreds of dollars per tonne, and the radical actions that activists seek would cost even more. If the cure is worse than the disease then we're no farther ahead. So let's act, but not act foolishly.