Heat: The small business with a big plan to cut carbon emissions

Half of energy is used as heat and, both across the world and here in the UK, most of that comes from fossil fuels. <br /><br />But a small business in Hampshire thinks that have the solution to store and decarbonise heat - a heat battery. If successful, the breakthrough could eliminate 4% of global carbon emissions. <br /><br />On this week's ClimateCast Tom Heap visits the factory producing heat batteries for industry purposes. He speaks to founder James McNaghten about how aluminium and gravel could produce heat, on demand.<br /><br />Plus he speaks to Dr Iain Staffell, senior lecturer in Sustainable Energy at Imperial College London, about how to scale up the producing of heat batteries and their potential. <br /><br />Podcast producer: Emma Rae Woodhouse<br />Field producer: Mickey Carroll