Climate Change Mitigation Driving the Transition to Hydrogen. For climate experts, green or renewable hydrogen — made from the electrolysis of water powered by solar or wind — is indispensable to climate neutrality. It features in all eight of the European Commission’s net zero emissions scenarios for 2050. It is one of the magic words in the fight against climate change: hydrogen. This colourless, odourless and non-toxic gas—although highly flammable, as the Hindenburg airship disaster of 1937 attests—is a very minor component of the atmosphere. Hydrogen will make up 12 per cent of the energy mix by 2050, according to the International Renewable Energy Agency (IRENA). About 66 per cent of this hydrogen used, must come from water instead of natural gas, the agency suggested.