President Joe Biden wants to change the way the U.S. uses energy by expanding renewables, but he will need to navigate a host of challenges — including the coronavirus pandemic and restoring hundreds of thousands of lost jobs — to get it done. The wind and solar industries have managed to grow despite a less-than-supportive Trump administration, which favored fossil fuels such as coal. They have a new ally in the White House in Biden, who has set a goal of 100% renewable energy in the power sector by 2035. Now comes the hard part — making it happen. Disruption from the pandemic has cost the renewable energy industry, which relies heavily on labor, about 450,000 jobs. The pandemic has also made it more difficult to build wind and solar infrastructure and has redirected federal resources away from the energy sector.