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- 20.3.1 - Emissions to air
- 20.3.2 - Emissions to water
- 20.3.3 - Soil contamination
- 20.3.4 - Waste
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- 20.4.1 - Energy use
- 20.4.2 - Mining
- 20.4.3 - Water use
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- 20.5.1 - Chemicals
- 20.5.1.1 - Cleaning up the chemicals industry
- 20.5.2 - Paper and pulp
- 20.5.3 - Cement
- 20.5.4 - Iron and steel
- 20.5.5 - Non-ferrous metals
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- 20.6.1 - A historical perspective
- 20.6.2 - Current developments
- 20.6.3 - Future developments
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