Mongabay: Mongabay does not normally publish statements from environmental groups on climate policy matters, but this recent post from World Resources Institute preisdent Jonathan Lash is an exception. Debate is raging about the relative merits of a carbon tax or a cap and trade system as the centerpiece of federal legislation to reduce emissions that fuel global warming. Here is why cap and trade must be the U.S. policy instrument of choice. Q: WRI supports a cap and trade program over …