Civilization is in no immediate danger of running out of energy or even just out of oil. But we are running out of environment-that is, out of the capacity of the environment to absorb energy's impacts without risk of intolerable disruption-and our heavy dependence on oil in particular entails not only environmental but also economic and political liabilities.

Civilization is in no immediate danger of running out of energy or even just out of oil. But we are running out of environment-that is, out of the capacity of the environment to absorb energy's impacts without risk of intolerable disruption-and our heavy dependence on oil in particular entails not only environmental but also economic and political liabilities.