1. ‘The Causes of Climate Change’, Climate Change: Vital Signs of the Planet. 〈https://climate.nasa.gov/causes〉 (accessed Mar. 07, 2023).
2. ‘Daily CO2’. 〈https://www.co2.earth/daily-co2〉 (accessed Mar. 07, 2023).
3. ‘Global Warming Effects’, Environment, Jan. 14, 2019. 〈https://www.nationalgeographic.com/environment/article/global-warming-effects〉 (accessed Mar. 07, 2023).
4. ‘Oil Crisis 1973: Overview, Causes, Economic Growth & Effects’, StudySmarter UK. 〈https://www.studysmarter.co.uk/explanations/macroeconomics/macroeconomics-examples/oil-crisis-1973/〉 (accessed Mar. 08, 2023).
5. M. O’Riain, ‘The first oil crisis - passivehouseplus.co.uk’, Mar. 26, 2020. 〈https://passivehouseplus.co.uk/blogs/the-first-oil-crisis〉 (accessed Feb. 23, 2023).