Supply management can always be an issue. It works very well in this country, as we're all aware.
I understand what you're talking about with cross-border tariffs. If you don't have a program in place to deal with the environment and you want to export, you're going to be in trouble. Quite simply, importing nations will have great difficulty with a country that does not have a climate change plan in place.
When I was in Manila, I met importers from Manila. One of the first questions they asked me was, “What's your green footprint and what's your environmental plan? Quite simply, if you don't have one, you won't be doing much business here.”