미국 에너지산업 2017년도에 큰 폭의 성장세
US energy efficiency sector added 67,000 new jobs in 2017 but new jobs in solar declined
한글번역 : http://www.kosen21.org/info/globalNews/globalNewsDetail.do?articleSeq=4062
기사원문 : https://www.renewableenergymagazine.com/panorama/us-energy-efficiency-sector-added-67-000-20180521