Reuters: Cruise companies are balking at a proposal to create a low-emissions buffer zone around the United States and Canada, saying it sets arbitrary boundaries based on faulty science that overstates the health benefits. The proposed Emissions Control Area would extend 200 nautical miles, which is 230 statute miles, around the coast of the two nations and set stringent new limits on air pollution from ocean-going ships beginning in 2015. The International Maritime Organization (IMO), …