据1989年十一月份提交给“气候变化国际专家小组”的一项报告揭示,在过去十年中,全球天气发生了“前所未有的、迅速的”变化。百分之九十至九十五的可靠数字表明全球气温将不可避免地进一步升高。到目前为此,地球温度已升高大约半度,并且到2030年将会再升高四度。在日内瓦会议上(该会议是预定于1990年六月在伦敦召开的一次部长会议的予备会议),代表们就逐步停止使用卤代碳氢化合物包括四氯化碳问题达成了协议,并就发达国家支持贫穷国家改用化学品代用物问题达成了协议。 According to a report submitted to the International Panel of Experts on Climate Change in November 1989, the world has seen “unprecedented and rapid” changes in the weather over the past decade. The reliable figures from 90 to 95 indicate that global temperatures will inevitably further rise. So far, Earth's temperature has risen by about half a degree and will rise by another four degrees by 2030. At the Geneva conference, which was a preparatory meeting for a ministerial meeting scheduled to be held in London in June 1990, delegates reached an agreement on phasing out the use of halocarbons, including carbon tetrachloride, The developed countries reached an agreement on supporting the transition from poor countries to chemical alternatives.