The world runs on energy, so finding low-emission alternatives to fossil fuels is crucial. Wind and solar are cheap and abundant but can't do everything. But hydrogen fuel could complete the picture.
Recent pipeline explosions have brought the problem of Mexico's black market for oil into tragic relief.
Australia's recently announced review of its national fuel stockpiles is timely indeed. The country is almost totally reliant on oil being shipped through some of the world's most contested regions.