What’s the most eco friendly device

Question: What’s the most eco friendly device
- Keywords:
  eco friendly,
  environment
Asked by quiz021ear to Olga, Madhumidha, Connor, Aruna, Anthony on 12 Mar 2020.
- Anthony Newell answered on 12 Mar 2020:
  
  Renewable energy generators like wind turbines and solar cells help us make clean energy so they’re very eco friendly.
- Connor McGookin answered on 12 Mar 2020:
  
  Agree with Anthony but I’d add that it’s one made from junk / scrap metal, check out this guys work – https://www.youtube.com/watch?v=arD374MFk4w
- Aruna Chandrasekar answered on 12 Mar 2020:
  
  Well, it isn’t a device, but i think trees are the most Eco-friendly. They are what will save our planet.

Question: What’s the most eco friendly device