Well for all the people rejoicing about this decision, you'd have to think they had a viable alternative.

We need to do something as global citizens. We only have one planet, and it's a real beauty. We need to take care of it.

All this posturing and partisanship and name-calling is unhelpful. It's like the passengers on the Titanic arguing about deckchairs while the ship is sinking.

I'm glad Trudeau is taking a principled approach. He is right that we don't have to - and in fact shouldn't - treat the environment and economics as two separate issues.

We'll feel some pain, and some people will whine, but most of us will understand that sometimes we have to rise above pettiness, show leadership, and make sacrifices.

Tick-tock, time is running out.