The clean energy sector is bouncing back from a couple of years it'd rather forget, dominated by huge job losses, bankruptcies and political controversy in the U.S.
Clean energy investment has fallen about 22 percent since its 2011 peak, to $314 billion in 2013, according to Bloomberg New Energy Finance data.
Companies, such as wind giant Vestas, and the larger industry have re-structured. "We're not seeing what anyone could characterize in any way as a collapse," Michael Liebreich, founder of Bloomberg New Energy Finance, said at Monday's launch of a report on global trends for 2014. Most of the decline in global investment numbers can be attributed to falling prices, particularly in wind and solar, he said.
Click ahead to see how individual technologies fared last year, listed from least to most investment, by Bloomberg Rankings.
Left: A three-dimensional visualization of the flow in a simulated wind farm.
Watch for updates from the BNEF Future of Energy Summit.