Net zero is currently the most important issue for the development of industries and societies. More than 100 countries have announced their timetables for achieving net zero. The International Energy Agency (IEA) has also unveiled key strategies for net zero and include the increase of renewable energy and the development of hydrogen energy. Factors such as the Russia-Ukraine war have heightened awareness among governments of the need for energy independence. All these factors have contributed to a rising interest in renewables and hydrogen.