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阅读理解
We should also know that“greed”is little related to the environmental crisis．The two main factors are population pressures, especially the pressures of large city population, and the desire to bring a satisfactory living with the lowest possible cost to the largest number of people．
The environmental crisis is the result of success in cutting down the death rate of babies, which has given us the population explosion, success in increasing farm output sufficiently to prevent mass famine(饥荒), success in getting people out of the tenements(租房)of the 19th century city and into the ownership of single family home in the suburb，which has given us urban traffic jams．The environmental crisis, in other words, is the result of doing too much of the right sort of thing at large．
To overcome the problems that success always creates, one must build on it．But where to start?Cleaning up the environment requires determined, sustained(持续的)efforts with clear targets and deadlines it needed, above all, concentration of effort．Up to now we have tried to do a little bit of everything, what we ought to do first is to draft a list of priorities(优先解决的问题)．
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