The world's first hydrogen double-decker bus fleet has reached the end of the road. The multi-million pound project in Aberdeen - involving 25 buses - was meant to be the future of clean public ...

Levels of hydrogen in the atmosphere have jumped by 60 per cent since pre-industrial times, underscoring the dramatic impact fossil fuel burning has had on the planet’s atmospheric composition.

Early Cold War reconnaissance demanded an aircraft that could outrun missiles and interceptors. Lockheed explored liquid hydrogen propulsion to reach Mach 2.5 above 99,000 feet, carrying more than 160 ...