1. Audi USA (2015) Researchers produce first Audi e-benzin. Press release, 21 May 2015
2. Augusyin L et al (2004) Eight glacial cycles from an antarctic ice core. Nature 429:623–628
3. BBC (Newsbeat) (2017) Blue planet 2: how plastic is slowly killing our sea creatures, fish and birds. http://www.bbc.co.uk/newsbeat/article/42030979/blue-planet-2-how-plastic-is-slowly-killing-our-sea-creatures-fish-and-birds . Accessed 25–27 Feb 2018
4. Better World Solutions (2017) Factory sea salt batteries. https://www.betterworldsolutions.eu/factory-sea-salt-batteries/ . Accessed 25–27 Feb 2018
5. Browne M (2011) Benign by design. Launch. https://www.launch.org/innovators/mark-browne . Accessed 25–27 Feb 2018