考查事实细节。根据关键词Kyoto Protocol 定位到文中第四段Consider the Kyoto Protocol (京都议定书). It allowed countries that joined to punish those that didn't. But it hasn't reduced CO2 emissions (up about 25% since 1990), and many signatories (签字国) didn't adopt tough enough policies to hit their 2008-2012 targets.可知《京都议定书》允许缔约国惩罚非缔约国，但是签订以后，二氧化碳的排放量并没有减少，因为很多缔约国没有出台强硬的政策限制能源的使用。05.What is the message the author intends to convey?
AGlobal warming is more of a moral issue than a practical one.
BThe ultimate solution to global warming lies in new technology.
CThe debate over global warming will lead to technological breakthroughs.
DPeople have to give up certain material comforts to stop global warming.