hydrogen-fuelled home boilers would be worse for the environment than existing models that burn natural gas and which the Government wants to phase out, scientists have claimed.
So-called blue hydrogen is expected to form a key part of the Government's plans to fight climate change and ministers have said gas boilers could be banned as soon as 2035.
But the study, from Cornell University in the US, suggests its production - when methane, a key component of natural gas, is split - is 20 per cent more harmful to the environment than burning gas or coal for heat. The researchers said more greenhouse gases - methane and carbon dioxide - would escape during extraction.
Many environmentalists back green hydrogen instead, which is created by using electricity to split water.