Climate Central: One out of every six molecules of climate pollution released to the atmosphere next year will be regulated under a cap-and-trade system, according a new global estimate that highlights the remarkable ongoing growth in carbon markets around the world.
Under cap-and-trade systems -- pioneered in recent years in Europe and some U.S. states and spreading through Asia and Canada -- governments trying to slow global warming impose industry- or economy-wide caps on climate pollution. Companies then buy...