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Subject
- Water treatment plants--Waste disposal[remove]4
- Local transit3
- Parks3
- Recycling (Waste, etc.)3
- Sewage3
- Air--Pollution2
- Animals2
- Community centers2
- Cycling2
- Farmers' markets2
- Gardens2
- Museums2
- Sustainable buildings2
- Water--Pollution2
- Community gardens1
- Compost1
- Culture1
- Environmental education1
- Environmental management1
- Habitat (Ecology)1