mental conservation and economic activities are substantially intertwined;
and that without global collaboration a healthy, sustainable biosphere is not
possible.

Looking back on the historical development of the environmental move-
ment during the twentieth century, it is apparent that the world has partially
shifted itself in a new direction. That is not to say that a Chernobyl-like acci-
dent could never reoccur, that people will never be exposed to a cancer-
causing substance, that no species of wildlife will ever become extinct, that
any natural environment will never be exploited, or that global climate
change will not occur. There is a great deal of work yet to be done on these
and many other environmental concerns. As the needs and goals of the
global community change in the twenty-first century, new environmental
issues no doubt will emerge to be reckoned with, and new environmentalists
and organizations will arise to meet those challenges.

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