Diamond's Top 12

From "Collapse," here is Jared Diamond's most serious environmental problems facing past and present societies:
1. Destruction of natural habitats
2. Loss of wild food sources (especially fish)
3. Loss of wild species and biodiversity
4. Soil loss and damage
5. Reliance on non-renewable energy sources
6. Threats to freshwater
7. Abuse of the photosynthetic ceiling (reducing growing capacity)
8. Chemical pollution and toxic overload
9. Introduction of alien species
10. Greenhouse gas emissions (global warming) & ozone depletion
11. Unchecked population growth
12. Resource consumption & per-capita impact

What would you add to the list?