On the worldbank.org website, you can find out that, in 2018, 11% of the world population did not had access to any energy sources. This datum alone shows why the access of an affordable energy source is much needed in the world. It is good to have an affordable energy source, but the real sustainable development goal is to have a reliable, affordable and, last but not least, clean energy source. Indeed, on the website of the Government of Canada, it is said that only 13% of the energy worldwide was produce by renewable sources in 2018.