11:33 | Heating our homes with cold water! Sounds absurd? It’s not. Heat pumps are revolutionizing the way we heat and cool our homes and cities. We went to the German city of Mannheim to find out how.
14:12 | A UK company has developed a heat pump system based on the principles of the Stirling Engine, using no HFC refrigeration gases and with a 30% saving in energy costs compared to existing systems.
13:35 | Geothermal energy could be potentially transformational for our power grids. But you and I can also get in on the act by drawing our own domestic heating from beneath our gardens (or communal gardens if you live in an apartment block).