There are currently around 17 governments world wide that have adopted hydrogen strategies, including the likes of the e uan and germany. So called green hydrogen is very expensive when you compare it to gray hydrogen which is widely produced from fossil fuels. People also point out that in many fields, there are also alternative technologies. Take transport, for example, passenger cars. In heating, for example, you could potentially use electric heat pumps. There are other alternatives instead of hydrogen boilers.