- Environment Bureau
- Environmental Protection Department-Case Studies of Carbon (Chinese Only)
- Hong Kong Observatory – Climate Change
- Council for Sustainable Development
- Waste Reduction Website
- Electrical and Mechanical Services Department - Promoting Energy Efficiency and Cosnervation
- World Wide Fund HK - Carbon Calculator
- World Wide Fund HK - Climateers
- Hong Kong Carbon Reduction Campaign
- Kadoorie Farm and Botanic Garden – One Tonne Challenge
- Hong Kong Organic Resources Centre (Chinese version only)
- Greeners Action (Chinese version only)
