From Sam Edge, Ringwood, Hampshire, UK
The possibility of geologic hydrogen reserves in mountain ranges is very interesting. But Frank Zwaan saying that these or any other fossil hydrogen sources are “like a free green energy source” is naive at best. Drilling for hydrogen is neither renewable nor without substantial operational and environmental cost(17 May, p 14).
Fossil hydrogen would be better than fossil petrochemicals to use as fuel where other stored energy isn’t practical, such as for aviation. However, it would be much more sustainable to generate hydrogen from clean electricity and water.
