Yet they have at times assumed shortterm burdens to achieve longterm goals. Industrial democracies have sometimes found it difficult to overcome political constraints to longterm sustainability. Sustainable development must include all humans particularly the poor. In addition economic activity must consider environmental costs of production. We must adopt new beliefs such as humans are not separate from nature and depend on its finite natural resources. We must tighten the alliance between science and policy. Governmental and private policy must steer this revolution. Unlike the agricultural and industrial revolutions the revolution needed to achieve sustainable development must involve a fully deliberate operation guided by foresight. Even though climactic change models have convinced many scientists of the likelihood degree and limits of environmental threats people do not understand them let alone being willing to change behavior to avert distant threats. To avert the threats of the environmental crisis most of the worlds population must change its behavior.
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