electric grid

Net generation by renewable sources across all sectors. Two fastest growing are wind (orange line) and solar (green line)
U.S. Energy Information Administration

Multiple proposals from Democratic presidential candidates are calling for a full transition from fossil fuels to renewables over the next 10 years. Independent analytics firm Wood Mackenzie was interested in the numbers behind those proposals. It found a transition would take closer to 20 to 30 years. Dan Shreve, head of global wind energy research at Wood Mackenzie, co-authored the report.