"the deal ....may require Ottawa to buy costly international carbon credits to meet its international 2030 targets...."

Translation:

Dear Canada.

We, the developing world, appreciate all of your efforts to hobble your own resource industries while we charge ahead on ours, and also as we continue to eat your lunch in other areas of economic development.
AND, we are very pleased that you will pay us for the privilege of doing it.

Thanks ever so much,
The Climate Change Victimhood Cartel of Nations.

PS. please continue to send three or four times as many delegates as any other developed nation to all upcoming climate change conferences. It is a source of great comfort, and humor, to us as gaggles of Canadian bureaucrats wander around aimlessly and powerlessly while deals are negotiated that will see your outrageously high standards of living brought to a more reasonable level - just at or below ours.

Toodles.