1992年首届里约地球峰会签署的三项伟大条约执行成绩如下：气候变化－F，生物多样性－F，防治荒漠化－F。 人类究竟还能否避免被开除球籍的厄运？
The grades for implementation of the three great treaties signed at the first Rio Earth Summit in 1992 were as follows: Climate Change – F; Biological Diversity – F; and Combating Desertification – F. Can humanity still avoid getting itself expelled?