Houston Chronicle: The climate change debate has moved beyond the “cause and effect” tug-of-war. We`ve acknowledged that in North America we`re voracious consumers of carbon resources and devour a disproportionate share of the world`s energy. If admitting we have a problem is the first step toward recovery, we`re headed in the right direction. But there`s hard work ahead — and hard choices to make. Much is riding on one of our first tough choices: the design and implementation of a policy that …