Against this backdrop, clean energy continues to fuel the plans of many cities, states, nations, investors, and companies as they look for the next wave of innovation and growth. And on many counts, the clean-energy sector is delivering new job and economic opportunities, as it moves from a once-marginalized niche to an increasingly cost-competitive, mainstream offering. There are many challenges facing the sector, but clean energy and more broadly, clean tech, offer some of the largest growth opportunities on the global economic horizon. As we highlight in this report, green jobs can pay well and span the spectrum from “green-collar” trade jobs to Ph.D.-level engineers.