Lessons in Simplicity on Warming

The most useful lessons to be learned in the fight against global warming can probably be gleaned from grade-school problem-solving exercises - for example, that letting air out of the tires of a truck that doesn't quite fit under a bridge is easier than raising the bridge. In other words, difficult problems don't always call for complicated solutions.

Three sectors produce most of Canada's atmosphere-clogging (a.k.a. greenhouse gas or GHG) emissions: oil and gas (including the tar sands), transportation and electricity generation (mainly from coal).