原因解决论1.what is the problem and the possible effect it causes2.what are the causes of the problem3.what are the solutions of the problem4.the possible results of these solutions例文毫无疑问我们今天的生活中比过去的噪音要多得多，尤其是在城市，而这可能是对我们有最直接影响污染形式。
举个例子来说，我们已经发现长时间接触高分贝的噪音可以导致听觉丧失和高血压。
也可能带来压力，失眠和像压抑这样的心理问题。
这些问题又通常导致工作效率低由于员工太累压力太大无法高效工作。
There is no doubt that we have to live with far more noise than in the past, particularly in cities, and this may be the form of pollution which affects us most directly. For example, it has been found that prolonged exposure to high levels of noise can lead to hearing loss and high blood pressure. It may also give rise to stress, insomnia and mental problems including depression. These problems, in turn, often result in lower productivity at work because employees are too tired and stressed to work efficiently.为了有效的解决这个问题，我们必须搞清楚什么导致了噪音的上升。
有三个主要原因。
第一，有交通噪音，原因是公路上不断增加的汽车。
第二条主要噪音源在城市是低空飞行的飞机，要么是刚起飞要么是刚刚在当地机场降落。
最后，有些噪音是邻居在大声听音乐看电视或者使用很闹人的电动工具比如说带锯和割草机造成的。
In order to find effective solutions to the problem, it is necessary to understand what has brought about this increase in noise. There are three main causes. Firstly, there is traffic noise, due to the ever-increase number of vehicles on roads. The second major source of noise in our cities is \low-flying aircrafts which have either just taken off, or are just landing at local airports. Finally, there is noise caused by neighbours listening to music or watching television at full volume, or using noisy power tools such as drill or lawn mowers.很明显，噪音是一个严重的问题。
因此我们必须要采取措施减少日常生活中的噪音量。
考虑到交通噪音，答案显而易见是对于难写在繁忙公路附近的建筑进行隔音改造。
另外，当地政府应该考虑在居民区实施严格的速限。
Clearly, noise is a serious problem. It is therefore essential that measures should be taken to reduce the amount of noise in our daily lives. Regarding traffic noise, the most obvious answer is improved soundproofing for buildings near busy roads. In addition, local authorities ought to consider imposing strict speed limits inresidential areas.减少飞机噪音的一个办法是通过建立机场远离城区。
还有，立法应该禁止飞机在高层建筑区上空飞行。
至于邻居，唯一有效的办法是我们所有人的行为更加考虑周全，比如说，把音乐电视的声音开小以及限制闹人的电动工具的使用。
One way in which aircraft noise could be lessened is by building airports further away from urban areas. Moreover, legislation should prohibit aeroplanes from flying over built-up areas. As far as noisy neighbours are concerned, the only effective solution is for us all to behave more considerately by, for example, turning down of volume of music and televisions and limiting our use of noisy power tools.结论，解决这个问题不是一哈子的事。
但是，只要用我说的方法，我们所有人都活的舒服些。
生活工作环境都安静了，人们就会觉得更加放松而且他们不太可能因为接触高分贝的噪音搞得身上不舒服心理不舒服。
In conclusion, there is no simple solution to the problem. However, if the measures I have suggested were introduced, we would all enjoy a better quality of life. As a result of living and working in a quieter environment, people would feel more relaxed and they would be less prone to the physiological and psychological problems that are known to stem from exposure to high level of noise.问题+解决1. Some species are unable to adapt to the changing climate brought about by global warming.Solution f: CO2 emission from vehicles and industry should be reduced and more use made of renewable energy sources such as wind and solar energy.2. Overfishing upsets the natural balance of marine life.Solution d: Governments should impose strict limits on fishing.3. Logging to provide timber for industry destroys forests.Solution e: Industry ought to only use timber from renewable forests.4.Some endangered species are still hunted due to the demand fortraditional medicines, ivory, skins and other animal products. Solution a: There ought to be an international agency to stop the trade in products made from endangered species.5.Industry continues to pollute rivers, lakes and coastal areas. Solution b: Companies that pollute must be heavily fined.6.Forests are cleared to provide agricultural land.Solution c: Woodlands should be harvested for natural resources rather than cleared in order to grow cash crops.原因解决轮2：大量的动物物种受到灭绝的威胁，主要是由于人类活动。
蛮明显，这本身就是个蛮大的环境问题灾难，因为它减少了地球的生物多样性。
然而，它还可能带来一些农业问题，因为很多昆虫的消失会影响农作物授粉的过程以及对害虫的控制。
进一步来说，很多用作制药的植物也会消失。
Large numbers of animals and species are threated with extinction mainly as a result of human activity. Obviously this constitutes a major environmental disaster in itself since it reduces the biodiversity of our planet. However, it could also give rise to agricultural problems since the disapprearance of many insects would affect pollination (授粉) and pest control. Furthermore, many of the plants used for making medicines would also disappear.在提出这个问题的解决办法之前，我们需要搞清楚有些可能造成大量物种灭绝的人类活动。