This May 7 Globe and Mail article gives an indication of some of the difficulties that international carbon trading schemes could impose on individual countries. If rules imposed and monitored by the U.N. are not followed, or carbon reporting mechanisms are deemed insufficient by the U.N.’s “enforcement branch,” a country’s right to trade carbon credits internationally could be restricted or suspended.

Canada will be probed on suspicion of violating rules for
registering greenhouse gases that are the mainstay of a UN-led fight
against global warming, official documents show.