Top 21 Amazing Eco Inventions (Earth Day 2016) - Formula E

To mark Earth Day 2016, we surveyed the Formula E office to ask for people's favourite sustainability projects. The answers that came back formed this list, divided into four categories: lifestyle, energy generation, air quality improvement, and transportation.

Which of these do you think is the most innovative? Which might make the biggest difference to the future of the planet? Which inspired you most to up your game in the fight against climate change? Let us know in the comments below...