[bryanlarsen]

You're right. The standard comment I hear is "Why should we do anything, China isn't doing anything and it's bigger than us"

My response is:

1. China is doing stuff. Not enough perhaps, but arguably more than we are. 2. Who are we to say anything? Canada has the highest per capita emissions in the world. If anybody should be first, shouldn't it be us?

But the free riding problem is still real. "Climate clubs" would completely demolish the "but China" problem.