One effect of benefit-cost analysis is to give any respectable engineer or economist a means for justifying almost any kind of project the national government wants to justify... Exclusive reliance on benefit-cost analysis has been one of the greatest threats to wise decisions in water development.

The issue of world environment has a special kind of urgency... The issue is one of rich peoples and poor peoples, of the growing gap between the two, and of the rich fouling their own nests.

The gap between the rich and poor is growing among and within most nations. The political and social effects of unequal location of energy and other mineral resources are acute. Population numbers continue to climb. The global environment shows signs of widespread deterioration. Both natural and social environments are increasingly vulnerable to catastrophic disturbances... There may, however, be a cheering challenge in the possibility that out of its struggle with these realities the human race may move a bit nearer to behaving as if it were indeed one family.

It would be rash to conclude that, on balance, the environment of the globe as a whole is either deteriorating or improving, or that the survival of the societies we know depends upon filling a simple set of prescriptions. It is all too complex and dynamic, whether it involves managing greenhouse gases or Nile snails... The future condition of the globe's interlocking natural and social systems depends more on human behavior than on the further investigation of natural processes, however desirable that may be.

One effect of benefit-cost analysis is to give any respectable engineer or economist a means for justifying almost any kind of project the national government wants to justify... Exclusive reliance on benefit-cost analysis has been one of the greatest threats to wise decisions in water development.

Floods are 'acts of God,' but flood losses are largely acts of man.

Every intervention of man in the environment around him incurs some risk as to both favorable and unfavorable consequences. Every intervention is taken in the face of partial ignorance as to what its effects will be and involves uncertainty as to the ultimate outcome.