BISMARCK — The North Dakota Public Service Commission got a walk-through Wednesday of the congressional bill that would create a “cap and trade” system to reduce greenhouse gas emissions in the U.S. Some don’t like what they’ve learned. It’s the Lieberman-Warner bill, which is expected to be debated in the Senate in June. It would set up a system in which coal-fired plants, farms, industrial processors, manufacturers, utility companies and others will be issued a set number of allowances which will then be decreased over the next few decades to match the decrease in their emissions, until 2031, when their...