A rendering of a green-hydrogen facility at a wind/solar farm. Photo: Petmal/Getty Images/iStockphoto

Hydrogen is key for the energy transition – but will it be green or blue?

Clean hydrogen will be a vital for energy storage, fuel and heat, but will it come from renewables (green) or gas with CCS (blue)? asks Leigh Collins in the main article of an in-depth special report

24 September 2019 11:37 GMT Updated  24 September 2019 12:30 GMT