We know that the levels of carbon dioxide have increased greatly over the last 100 to 150 years. It was a scientist called Charles Keeling\s\up1(27(27)， who made accurate measurements\s\up1(28(28) of the amount of\s\up1(29(29) carbon dioxide in the atmosphere from 1957 to 1997. He found that between these years the carbon dioxide in the atmosphere went up from around 315 parts to around 370 parts per\s\up1(30(30) million (see Graph 2)．

　　All scientists accept this data\s\up1(31(31). They also agree that it is the burning of more and more fossil fuels that has resulted in\s\up1(32(32) this increase in carbon dioxide. So how high will the temperature increase go? Dr Janice Foster says that over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees. \s\up1(27(27)Charles Keeling/'kiːlIŋ/查尔斯·基林

\s\up1(28(28)measurement/'meʒəmənt/n.衡量；测量；尺寸

make/take measurements 作测量

take sb.'s measurement 给某人量尺寸

\s\up1(29(29)the amount of ... ......的数量

\s\up1(30(30)per/pɜː/prep.每；每一

\s\up1(31(31)data/'deItə，'dɑːtə/n.资料；数据

a mass of data 大量资料

data bank 数据库；资料库

\s\up1(32(32)result in导致

result in后跟结果，而result from后跟原因。

　　[第4～5段译文],　　我们知道，在过去100～150年期间，二氧化碳的含量急剧增加了。有一位名叫查尔斯·基林的科学家曾经把1957～1997年期间大气层中二氧化碳的含量作了精确的统计。他发现，在这些年里，大气层中的二氧化碳含量从大约315/1 000 000上升到大约370/1 000 000见曲线图二。,所有科学家都接受这个数据。他们还赞同下述观点：正是燃烧越来越多的化石燃料导致了二氧化碳的增加。那么气温会升到多高？贾尼丝·福斯特博士说，在今后的100年里，全球变暖的量可能低到1～1.5摄氏度，但是也有可能高达5摄氏度。

　　However, the attitudes of scientists towards this rise are completely different. On the one would lead to a catastrophe\s\up1(35(35). She says, "We can't predict the climate well enough to know what to expect\s\up1(36(36)， but it could be very serious." Others who agree with her think there may be a rise of several metres in the sea level, or predict severe storms, floods\s\up1(37(37)， droughts\s\up1(38(38)， famines\s\up1(39(39)， the spread of diseases and the disappearance of species. On the other hand, there are those, like George Hambley\s\up1(40(40)， who are opposed to\s\up1(41(41) this view and believe that we should not worry about high levels of carbon dioxide in the air. They predict that any warming will be mild\s\up1(42(42) with few bad environmental\s\up1(43(43)consequences\s\up1(44(44). In fact, Hambley states\s\up1(45(45)， "More carbon dioxide is actually a positive thing. It will make plants grow quicker; crops will produce more; it will encourage a greater range\s\up1(46(46) of animals - all of which will make life for human beings hand\s\up1(33(33)， Dr Foster thinks that any trend\s\up1(34(34) in which the temperature increases by 5 degrees better."

　　Greenhouse gases continue to build up\s\up1(47(47) in the atmosphere. Even if\s\up1(48(48) we start reducing the amount of carbon dioxide and other greenhouse gases, the climate is going to keep on\s\up1(49(49) warming for decades or centuries. No one knows the effects of global warming. Does that mean we should do nothing? Or, are the risks too great？ \s\up1(33(33)on the one hand 一方面

\s\up1(34(34)trend/trend/n.趋势；倾向；走向

\s\up1(35(35)catastrophe/kə'tæstrəfI/n.大灾难；浩劫

\s\up1(36(36)what to expect为"疑问词＋不定式"结构，在句中作know的宾语。

\s\up1(37(37)flood/flʌd/n.洪水；水灾

\s\up1(38(38)drought/draʊt/n.旱灾；干旱

\s\up1(39(39)famine/'fæmIn/n.饥荒

\s\up1(40(40)George Hambley/'hæmblI/乔治·汉布利

\s\up1(41(41)be opposed to 反对......

opposed/ə'pəʊzd/adj.反对的；对立的

oppose/ə'pəʊz/vt.反对；反抗；与(某人)较量

\s\up1(42(42)mild/maIld/adj.温和的；温柔的；淡的

\s\up1(43(43)environmental/InˌvaIrən'mentl/adj.环境的

\s\up1(44(44)consequence/'kɒnsIkwəns; US ­kwens/n.结果；后果；影响

\s\up1(45(45)state/steIt/vt.陈述；说明

\s\up1(46(46)range/reIndʒ/n.种类；范围

\s\up1(47(47)build up 增加；逐步建立；增进

\s\up1(48(48)even if "即使"，引导让步状语从句。

\s\up1(49(49)keep on 继续