Fossil fuels still supply about 80% of the world’s power. How can energy be produced and used more sustainably to meet climate targets? We answer your questions. film supported by https://www.youtube.com/channel/UCypQjdd_Mz0yX7M7rekN4Bw 00:00 - Why energy needs to become more sustainable 00:33 - How much energy should come from renewables? 01:19 - Why isn’t nuclear power used more widely? 02:19 - How can solar power be made more efficient? 03:34 - Will biofuels become widely used? 04:30 - Do electric vehicles make a difference? 05:10 - How heating and air conditioning can be more sustainable Sign up to our fortnightly newsletter on climate change: https://econ.st/3pSnqt7 Find all of our climate change coverage: https://econ.st/33gSs6g The use of renewable energy is accelerating: https://econ.st/3IRkCFl Read about the first big energy shock of the green era: https://econ.st/3EZDmQK The bottlenecks which could constrain emission cuts: https://econ.st/3GKwg2R How governments spurred the rise of solar power: https://econ.st/3yrt2yi Read about the new solar cells that extract more energy from sunshine: https://econ.st/3pWOeID Watch our film about how to cool a warming world: https://econ.st/3m65o5D Nuclear power must be well regulated, not ditched: https://econ.st/3J2fY7E Can smaller reactors make nuclear power economic? https://econ.st/3pVKszu Is hydrogen the fuel of the future? Watch our film: https://econ.st/3IRNH3C Why creating a new hydrogen economy is a massive undertaking: https://econ.st/327snG4 Why efforts to make buildings greener are not working: https://econ.st/3GHTPcE How a new, green air-conditioning system manages without nasty gases: https://econ.st/31ZpCqS How electrical energy can be captured as liquid air: https://econ.st/3m6MKun The tricky business of charging electric cars: https://econ.st/31ZpoQv