State of the World

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价格:190.00

isbn号码:9780393019308

A False Sense of Security

Lester R. Brown

Although human activities have always

altered the natural environment, the

scale of disruptions in the late twentieth

century is unprecedented. The collective

actions of a world population approach-

ing five billion now appear capable of

causing continental and even global

changes in natural systems. As human

pressures build, the relationship be-

tween people and their natural support

systems can cross key thresholds, lead-

ing to a breakdown.