Check out the best- and worst-performing clean energy funds of 2021

Published Thu, Dec 30 20211:54 PM ESTUpdated Thu, Dec 30 20213:35 PM EST

Clean energy stocks came under pressure during 2021 as policy uncertainty, supply chain issues and concerns over stretched valuations weighed on the sector. But some areas within the renewable energy ecosystem still managed to not only register gains for the year but handily outperform the broader market. Here's a list of how some exchange-traded funds performed, ranked from best to worst, and the stocks they own: NorthShore Global Uranium Mining ETF (URNM) 2021 performance: +67% Assets under management: $715.5 million (as of Dec. 28) Top holdings: National Atomic Company Kazatomprom, Cameco , Sprott Physical Uranium Trust , Yellow Cake, Energy Fuels Expense ratio: 0.85% Global X Lithium & Battery Tech ETF (LIT) 2021 performance: +37% Assets under management: $5.56 billion (as of Dec. 28) Top holdings: Albemarle , Tesla , TDK Corporation , EVE Energy , Contemporary Amperex Technology Co. Expense ratio: 0.75% First Trust Nasdaq Clean Edge Smart Grid Infrastructure Index Fund (GRID) 2021 performance: +27% Assets under management: $818.7 million (as of Dec. 28) Top holdings: Schneider Electric, ABB , Johnson Controls , Eaton Corporation , Aptiv Expense ratio: 0.7% Amplify Lithium & Battery Technology ETF (BATT) 2021 performance: +14% Assets under management: $237.6 million (as of Dec. 28) Top holdings: Contemporary Amperex Technology Co., BHP Group , Tesla , BYD Company, Glencore Expense ratio: 0.59% First Trust Global Wind Energy ETF (FAN) 2021 performance: -13% Assets under management: $346.6 million (as of Dec. 28) Top holdings: China Longyuan Power Group Corporation Limited, Orsted , Northland Power , Vestas Wind Systems , Siemens Gamesa Renewable Energy Expense ratio: 0.61% iShares Global Clean Energy ETF (ICLN) 2021 performance: -25% Assets under management: $5.6 billion (as of Dec. 28) Top holdings: Enphase Energy , Consolidated Edison , Vestas Wind Systems , Orsted , Plug Power Expense ratio: 0.42% Invesco Solar ETF (TAN) 2021 performance: -25% Assets under management: $2.7 billion (as of Dec. 28) Top holdings: SolarEdge , Enphase , First Solar , Xinyi Solar Holdings, Sunrun Expense ratio: 0.69% Invesco WilderHill Clean Energy ETF (PBW) 2021 performance: -31% Assets under management: $1.6 billion (as of Dec. 28) Top holdings: Enovix , Tesla , MP Materials , Lithium Americas , Standard Lithium Expense ratio: 0.61%

PALM SPRINGS, CA - MARCH 27: Giant wind turbines are powered by strong winds in front of solar panels on March 27, 2013 in Palm Springs, California. According to reports, California continues to lead the nation in green technology and has the lowest greenhouse gas emissions per capita, even with a growing economy and population. (Photo by Kevork Djansezian/Getty Images)

Kevork Djansezian | Getty Images News | Getty Images

Here's a list of how some exchange-traded funds performed, ranked from best to worst, and the stocks they own: