From Canada.com: "Prime Minister Stephen Harper's government has bowed to international pressure, reluctantly taking a step toward a ''Kyoto 2'' agreement on climate change". It's too early to say exactly what this will mean. At least the obstructionist stance has been dropped for now.

Now the Harper government has to get the policy right within Canada. The proposed Alberta emissions policy reported in Saturday's Globe and Mail -- to reduce greenhouse gas emissions per barrel of oil produced -- is exactly the type of tricky logic I warned about in a column a couple weeks back.

Don't forget to let me know once you've used the carbon calculator (below)!