In 2014, renewable sources such as wind, geothermal, solar, biomass, and burnt waste provided 19% of the total energy consumed worldwide, with roughly half of that coming from traditional use of biomass.[8] The most important[clarification needed] sector is electricity with a renewable share of 22.8%, most of it coming from hydropower with a share of 16.6%, followed by wind with 3.1%.[8] As of 2018[update] according to REN21 transformation is picking up speed in the power sector, but urgent action is required in heating, cooling and transport.[9] There are many places around the world with grids that are run almost exclusively on renewable energy.