The clean energy sector has been one of the fastest-growing in the state in recent years. But now, more than 11,000 such workers are out of job due to the coronavirus pandemic, according to a study released Thursday.

Clean energy jobs can range from installing renewable energy projects like wind and solar to improving energy efficiency through weatherizing or rehabilitating buildings. At the end of 2019, Wisconsin had 76,685 people who were working in the clean energy sector, mostly in energy efficiency jobs....