Can the Sun cool down the Earth? (1 min 25 s)

Every hour, enough sunlight blasts the earth to power humanity for a year. By 2050, across the entire world, solar energy could power our computers, phones, lights, hot water – anything we use electricity for today. There would be no need to pollute the planet with oil, coal or gas. Plus, solar panels are cheap at the moment. What better way to save a heating planet?

– from the Guardian online.