短句子网1. 我们怎样帮助解决全球变暖问题
把铁屑倒入大海喂浮游生物的“健力多方案”可算其一。健力多是美国市场上出售的一种治疗缺铁性贫血的营养补充剂，科学家希望通过向海中施加铁元素，促进可吸收二氧化碳的浮游生物生长。美国一家私人公司正打算将此设想付诸实践。
人造“火山”则是1995年诺贝尔化学奖获得者保罗·克鲁岑等科学家力挺的方案。他们建议，用喷气式发动机、大炮或气球等各种手段将硫酸盐加入大气，为全球降温。
“太阳影”计划被美联社评为最离谱的降温设想。亚利桑那大学天文学家罗杰·安杰尔建议，发射16万亿个太空“飞碟”到地球和太阳间，它们连接成片，像遮阳伞一样，为地球抵挡阳光。NASA已花费7.5万美元探讨此方案。不过据估算，要完成它至少需要4万亿美元，耗费30年或更长时间。据新华社
2. 求一篇大学英语作文,关于全球变暖的,分三段,原因,解决方法,建
Global Warming At present, with the development of economies around the world may feel that the climate is becoming more and more warmer. CO2 makes up about 70% of the greenhouse gases. It is considered to be one of the greatest reasons of global warming.It's very serious, but many people can't recognize that because the only think about themselves. They don't mind the climate becoming warmer. They don't mind the ice melting. They don't mind how many animals become extinct. They don't mind how many coastal cities become flooded . They don't mind…… They are wrong. Global warming can have many strong influences for us. For example:Global warming will make trouble with physiology. People will become more easily ill and even breed new diseases. People will pay more and more money for health care but more and more people die. No amount of money or even the best doctors, wll not be able to save your life. Even if you aren't dying, you will feel sad and alone. So many relatives and friends' death will make you want to kill yourself.Global warming will give the air and ocean huge power. Thus making large or even super typhoons, hurricanes, tsunamis and other disasters. Many houses will be destroyed. Many place will flood. We will be faced with more and more disasters, damning more and more money and life.Rising temperatures will not only create higher sea level, but also will cause droughts. Large-scale areas will become arid and thus food production will be less. We will be without food. People around the world will face food shortages and more and more war will happen for food.If temperatures continue to rise, animals will come out of hibernation early, but will not have the food supply necessary to survive. For example: Insects will eat a lot of forests and crops with no natural enemies. Without forests, global warming will become more and more sercious, creating a vicious cycle. No crops, means no human food.The greatest of global warming is at ice age like in the movie “The Day After Tomorrow”, this is a scenario that take place.So we must do something to avoid these things from happening. First, we should use more and more clean energy and less oil and coal. Second, we should go to work by bus or on foot instead of driving. Third, we should plant more trees. The most important point is we should make a habit of saving energy in everyday life.。
3. 有谁知道全球变暖的原因和解决办法的英文
One of the reason of global warming is deforestation.deforestation is the massive cutting down of trees.Trees can absorb green gas such as carbon dioxide and produce oxygen gas.Carbon dioxide is a green house gas and will absorb heat from the sun and cause increase in temperature.
The solution of solving the problem of global warming is to reduce deforestation,and reforestation ,meaning plant back tree which have previously been cleared.
4. 有谁知道全球变暖的原因和解决办法的英文
One of the reason of global warming is deforestation.deforestation is the massive cutting down of trees.Trees can absorb green gas such as carbon dioxide and produce oxygen gas.Carbon dioxide is a green house gas and will absorb heat from the sun and cause increase in temperature.The solution of solving the problem of global warming is to reduce deforestation,and reforestation ,meaning plant back tree which have previously been cleared。
5. 高分急求
The detailed causes of the recent warming remain an active field of research. The scientific consensus is that the increase in atmospheric greenhouse gases due to human activity caused most of the warming observed since the start of the industrial era, and the observed warming cannot be satisfactorily explained by natural causes alone. This attribution is clearest for the most recent 50 years, for which the most detailed data are available.The greenhouse effect was discovered by Joseph Fourier in 1824 and was first investigated quantitatively by Svante Arrhenius in 1896. It is the process by which absorption and emission of infrared radiation by atmospheric gases warm a planet's lower atmosphere and surface. Existence of the greenhouse effect as such is not disputed. The question is instead how the strength of the greenhouse effect changes when human activity increases the atmospheric concentrations of some greenhouse gases.Recent increases in atmospheric carbon dioxide (CO2). The monthly CO2 measurements display small seasonal oscillations in an overall yearly uptrend; each year's maximum is reached during the Northern Hemisphere's late spring, and declines during the Northern Hemisphere growing season as plants remove some CO2 from the atmosphere.Naturally occurring greenhouse gases have a mean warming effect of about 33 °C (59 °F), without which Earth would be uninhabitable. On Earth, the major greenhouse gases are water vapor, which causes about 36–70 percent of the greenhouse effect (not including clouds); carbon dioxide (CO2), which causes 9–26 percent; methane (CH4), which causes 4–9 percent; and ozone, which causes 3–7 percent.Human activity since the industrial revolution has increased the concentration of various greenhouse gases, leading to increased radiative forcing from CO2, methane, tropospheric ozone, CFCs and nitrous oxide. The atmospheric concentrations of CO2 and methane have increased by 31% and 149% respectively since the beginning of the industrial revolution in the mid-1700s. These levels are considerably higher than at any time during the last 650,000 years, the period for which reliable data has been extracted from ice cores. From less direct geological evidence it is believed that CO2 values this high were last attained 20 million years ago. Fossil fuel burning has produced approximately three-quarters of the increase in CO2 from human activity over the past 20 years. Most of the rest is due to land-use change, in particular deforestation.CO2 concentrations are expected to rise due to ongoing burning of fossil fuels and land-use change. The rate of rise will depend on uncertain economic, sociological, technological, and natural developments. The IPCC Special Report on Emissions Scenarios gives a wide range of future CO2 scenarios, ranging from 541 to 970 ppm by the year 2100. Fossil fuel reserves are sufficient to reach this level and continue emissions past 2100, if coal, tar sands or methane clathrates are extensively used.。
6. 各国对全球变暖采取的措施
这个问题也是我一直也比较关心的，经你这么一提，我也想起来找找看了，这是我找到的内容，不知道是不是真的有效，也不知道到底有多少人在为问题而尽自己的一份力，看看吧！！现有遏制全球变暖的方法 科学家对近 20 年来地球陆地生态系统的碳排放与吸收情况进行研究之后认为，所谓的"碳沉降"效应可能只是暂时的，不能依靠它来长期遏制全球变暖。
"碳沉降"是指植被吸收的二氧化碳多于它们释放的二氧化碳，这有助于降低大气二氧化碳浓度，缓解全球变暖的趋势。 来自欧洲和美国等多个地区的 30 名科学家在将于 8 日出版的英国《自然》杂志上说，地球植被的碳沉降效果并不稳定，大气中二氧化碳和氧气含量的数据证实，陆地生物圈在 20 世纪 80 年代期间吸收和排放的二氧化碳数量基本相当，没有出现碳沉降，20 世纪 90 年代则有一定的沉降效果。
数据表明，20 世纪 90 年代的碳沉降效应主要出现在北半球的非热带地区，包括北美、中国、欧洲等。科学家认为，出现碳沉降的主要原因可能是上述地区的退耕还林。
此外，森林和草场火灾减少，使植被释放的碳减少，对碳沉降也有帮助。光合作用、呼吸作用、虫灾等其他因素的变化可能导致树叶、枯死植物和土壤微生物释放的碳减少。
科学家说，大气中二氧化碳浓度升高，可以提高植物生长速度，从而吸收更多的碳，暂时增强碳沉降效果，但这一效应终将达到饱和。影响碳沉降的不稳定因素很多，长期来看，全球陆地生物圈并不一定能够持续起到碳沉降的作用，特别是在温暖而干燥的年份。
森林救不了地球变暖 《环球时报》 （2001年06月08日第十六版） 进入夏季，在人们苦恼于气温"一年更比一年高"时，美国一群科学家又给了人们当头一棒，他们的最新研究表明：要想阻止气温逐年升高的趋势、化解温室效应的威胁，人类还得另想办法，而不能像从前那样寄厚望于森林。因为森林吸收的大量二氧化碳，最终几乎会如数奉还给地球。
温室效应被列为21世纪人类面临的最大威胁之一，它除了让天气变得越来越热外，还给全球的湿地沼泽、沿海低地、珊瑚礁、温带寒带大量物种带来毁灭性打击。 追根溯源，温室效应是过量的二氧化碳在大气中聚集而产生的一种天气现象。
绿色植物进行光合作用吸收大量二氧化碳，这已是人们长期以来的共识，因而一直以来，森林被认为是解决温室效应的利器。 5月24日出版的《自然》杂志发表了美国著名杜克大学的几位植物学家和生态学家的一份最新实验报告。
7年前，这几位科学家在杜克大学校区附近选择了两片森林，开始了评估树木吸收二氧化碳能力的实验。据推算，到2050年，排放到大气中的二氧化碳量将比现在增加35%-50%。
于是，他们就在第一组森林中不断施放二氧化碳浓度为560ppm(ppm为百万分之一)的气体，以模拟50年后的浓度水平；第二组森林则保持目前正常的二氧化碳水平，即浓度在365ppm左右。 在实验开始的前两年里，第一组森林的树木在高浓度二氧化碳下生长明显加快，生长速度比第二组森林的树木大约快25%。
但两年后，生长速度却在很短的时间内迅速下降，最终和第二组森林的树木的生长速度基本持平。分析原因，主要是土壤中的养分，特别是氮养分随着树木的迅速生长而消耗殆尽。
实验结果显示，树木生长需要阳光、水分、养分等多种因素，缺一不可，森林可以在短期内加速吸收二氧化碳，但因为土壤中的养分无法配套供应，所以从长期来看，无法指望森林会消化掉50年后增加的50%的二氧化碳。另外，科学家们在跟踪观察二氧化碳在树木生长过程中的作用后发现，树木吸收的二氧化碳主要是对树叶的生长起作用，对树干的作用则不明显。
这样带来的最要命的后果是，树叶脱落以后会慢慢腐烂，它所吸收的二氧化碳在3年内将几乎全部回到大气中，而并非像以前人们所说的那样，会留在土壤里。 主持这项实验的杜克大学生物学教授戴维·埃斯沃斯对这一结果评价说："如果这一结果在全球植被生态中被普遍证实，人们就不得不对环境问题进行再思考了。
"目前，已经有实验表明，热带树木与其他地区的树木相比，对二氧化碳的吸收能力相对更低一些。 外界对这份报告给予了极大关注。
美国伊利诺伊大学的一位植物学家说，这一结果的"潜在重要性"会越来越明显，它彻底推翻了人们的传统观念。 尽管森林在涵养水源、防止水土流失、调节气候等方面都有无可替代的作用，但在大量消化二氧化碳的能力上，人们不能太乐观。
参与这项实验的另一位生态学教授拉姆·奥林认为，这一实验结果的重要性就在于此。他说，也许人们只能从减少二氧化碳气体的排放量入手来解决温室效应问题了，这将使全球的环保问题变得更为复杂，利益冲突更为尖锐。
减少二氧化碳的排放量，一直是国际间一个极为敏感的问题。去年的海牙国际环保会议不欢而散，美欧之间争执的关键问题就是二氧化碳排放标准。
美国坚持认为，对发达国家排放量的限制应当考虑到森林对二氧化碳的吸收因素。如果考虑这一因素，对50年后的前景就不必过于悲观，对发达国家的二氧化碳排放标准的要求就不必过于苛刻。
现在，这项最新的实验成果可以说正击中。
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