However, because it is innovative and new (at the demonstration and early market introduction stages) the typical household in rural settings would not be appropriate for hydrogen use. There are, however, some 400 stationary hydrogen demonstrations in the world. Unlike the photovoltaic industry or solar water-heating and cooling and other alternative technology industries which have started from scratch, hydrogen is already a large business with an infrastructure that can kick-start production, storage, delivery or energy applications as the deployment process continues.