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Subject
- Sustainable living245
- Description and travel58
- Environmental protection26
- Citizen participation23
- Human ecology21
- Economic aspects19
- Economic conditions18
- Environmental aspects18
- Environmentalism18
- Green movement15
- Employee ownership13
- Solidarity13
- Sustainable development13
- Environmental policy10
- Recycling (Waste, etc.)10
- Renewable energy sources10
- Social life and customs10
- Energy conservation9
- History9
- Consumption (Economics)8