chapter  1
Pages 38

Effective action may not require perfect understanding, but a sensible, realistic grasp is essential. After generations of intensifying scientific research and management experience we have such a knowledge to ease our way through many difficult environmental challenges-but we still lack it in a much larger number of cases, including most of the matters of critical global importance. Moreover, we will not be able to resolve most of the uncertainties during the next one or two generations, that is, during the time of increasing pressures to adopt unprecedented preventive and remedial actions.