Agriculture's greenhouse-gas footprint comes not only from methane released by livestock and rice paddies, but from land-use change itself: clearing forest for new farmland releases stored carbon immediately, while the replacement cropland typically sequesters far less carbon than the forest it replaced ever did. Expanding farmland to feed a growing population can therefore raise emissions on two fronts at once, from the clearing itself and from the lower ongoing carbon storage of the land afterward.

Which one of the following is the most logical inference that can be made from the passage given above?