There are many things U.S. citizens can do to try and reach the Kyoto plans without hurting the U.S. economy.
Obviously if I was Bush and it was discovered that there is no way the U.S. could reach Kyoto agreement without hurting the economy I'd tell them to jump in a river as well, but I would still make as much as an effort as possible to reduce green house gasses as much as possible.
Here is something Canada has initiated. the "One tonne challange"
http://www.climatechange.gc.ca/plan_...ada/challenge/
I'm sure there is more that the Canadian government could do but at least its a start.