The question at stake is that there is no we here. Of course you can use the pronoun. But it does reflect the reality.

And one trap here is we must have a we. The old way is to say it must be a collective joint action is not right. There is a reason why we have carbon tax, which is a market solution to a commons issue. Not I am saying you can do that. But individual countries as individuals should be an option.

Sometimes there is no we. We may want to no we as well sometimes ;-)