One: Environmental Externalities.- 1. Nature in Pigouvian oriented economics.- 2. Correcting national income for environmental losses.- 3. The mirror of cleanliness.- 4. Land use externalities in national accounting.- 5. Taxes versus regulation.- 6. Efficiency in transboundary pollution abatement.- Two: Environment, Growth and Steady State.- 7. Economic growth, technology and the environment.- 8. The steady state economy.- 9. Entropy, synergy and economic change.- 10. The neo-classical and steady state approaches.