1. UNITED NATIONS (2015) Paris Agreement [ONLINE] Uited Nations. Available from: https://unfccc.int/process-and-meetings/the-paris-agreement/the-paris-agreement [Accessed 06/02/2021].
2. HARRABIN, R. (2020) Google says its carbon footprint is now zero [ONLINE] BBC. Available from: https://www.bbc.co.uk/news/technology-54141899 [Accessed 06/02/2021].
3. TESLA (2021) Tesla Gigafactory[ONLINE] Tesla. Available from: https://www.tesla.com/gigafactory?redirect=no [Accessed 06/02/2021].
4. APPLE (2020) Apple commits to be 100 percent carbon neutral for its supply chain and products by 2030[ONLINE] Apple. Available from: https://www.apple.com/uk/newsroom/2020/07/apple-commits-to-be-100-percent-carbon-neutral-for-its-supply-chain-and-products-by-2030/#:∼:text=Apple%20decreased%20its%20carbon%20footprint,product%20use%20by%2073%20percent. [Accessed 06/02/2021].
5. SIEMENS (2020) Siemens cuts CO2 emissions by 54%[ONLINE] Siemens. Available from: https://press.siemens.com/global/en/pressrelease/siemens-cuts-co2-emissions-54 [Accessed 06/02/2021].