iShares Global Clean Energy ETF ( NYSEARCA:ICLN) delivered a 49% return over the past year, nearly tripling the S&P 500's 18% gain. The fund tracks approximately 100 global companies in renewable energy, utilities, and clean technology. With $1.9 billion in assets and a 0.39% expense ratio, ICLN provides broad exposure to solar, wind, fuel cells, and electric utilities positioned to benefit from surging power demand.