Green energy: Which sources are the most sustainable?

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 @Infosys 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: Find all of our climate change coverage: The use of renewable energy is accelerating: Read about the first big energy shock of the green era: The bottlenecks which could constrain emission cuts: How governments spurred the