题目选项分析

The agreement, the first to formally require industrialized countries to cut emissions of gases linked to global warming, is a formal protocol under which 38 industrialized countries must reduce emissions of these gases by 2012 or face heavy penalties.

The agreement, the first to formally require industrialized countries to cut emissions of gases linked to global warming, is a formal protocol by which 38 industrialized countries must reduce emissions of these gases by 2012 or face heavy penalties.