The colourful world of hydrogen
One thing is for sure: hydrogen (H2) is gaining increasing importance in Germany’s sustainable energy supply. The contribution H2 can make to reduce greenhouse gas emissions depends primarily on its production process – based on the production process, the CO2 footprint can turn out differently. The plans for an efficient but also low-emission H2 production process are being elaborated today. This article outlines possible options and perspectives and describes the hydrogen colour theory.