1. Albuquerque J. 2019. Charcoal production: challenges and opportunities. Inflor.com. https://www.inflor.com.br/en/charcoal-production-challenges-and-opportunities/. Accessed 2 Nov 2020
2. AM (2020) Climate action in Europe. Our carbon emissions reduction roadmap. ArcelorMittal. https://corporate-media.arcelormittal.com/media/yw1gnzfo/climate-action-in-europe.pdf. Accessed 2 Nov 2020
3. Andrews R (2015) Renewable energy storage and power-to-methane. Energy Matters. http://euanmearns.com/renewable-energy-storage-and-power-to-methane/. Accessed 2 Nov 2020
4. Bardi U (2014) Extracted: how the quest for mineral wealth is plundering the planet. Chelsea Green Publishing
5. Barnard M (2019) Heliogen is Bill Gates’ latest venture that is only good for oil & gas Part 1. https://cleantechnica.com/2019/11/22/heliogen-is-bill-gates-latest-venture-that-is-only-good-for-oil-gas-part-1/. Accessed 2 Nov 2020