1. Air Pollution Water Pollution Solid Waste Noise Frequency
2. Comparison
3. Raw Material
   1. No Toxins
      1. RoHS/ELV
      2. Halogen-Free
      3. REACH
   2. Recyclable
   3. Reuse
   4. Recover
   5. Recycled
   6. Biodegradable or Photodegradable
      1. Corn Plastic
      2. Nature Organic
      3. Packaging
      4. Farming
      5. Medicine
   7. Locally Sourced
      1. Reduce Material Transportation
      2. Reduce Human Traveling
   8. WEEE, 3R
4. Mechanical Design
   1. Single Material
   2. Easy Disjointed
   3. Common Models
   4. Fewer Waste
   5. Up 3R rate
5. Production Technic
   1. Component Manufacturing
   2. Less Working Station
      1. Reduce Operators
      2. Higher Delivery Efficiency
   3. High Quality
      1. Reduce Re-work
      2. Reduce Debug
      3. Less Re-turn
   4. Less Chemical Using
      1. Health Up
      2. Reduce Materials Using
6. Energy Consumption
   1. Low Energy Using
      1. Energy Star
      2. EPEAT
   2. Eco-energy Using
      1. Solar-power Charger
7. Human Factor Engineer
   1. Considerate Design
      1. More Using Life
   2. Lower Noise
8. 1. Smaller, Fewer, Lighter 2. Single Material
9. Fewer: 1. Waste, Pollution 2. Sub-materials Using 3. Transportation 4. Energy Waste