Increased demand from cheap coal could help fire up the global coal ETF, Market Vectors Coal ETF (NYSEArca: KOL). Along with a 37.0% weight toward the U.S., KOL has foreign exposure to China 23.2%, Australia 10.7%, Canada 7.6%, Thailand 7.3% and Indonesia 7.0%. [Coal ETF Searches for Momentum]

In the green energy sector, investors can look at subsector-focused ETFs, like the Guggenheim Solar ETF (NYSEArca: TAN), Market Vectors Solar Energy ETF (NYSEArca: KWT) and First Trust Global Wind Energy Fund (NYSEArca: FAN). For solar picks, TAN includes a large 42% tilt toward the U.S., whereas KWT has a smaller 33.4% weight toward U.S. companies. FAN includes a 11.5% weight in U.S. firms, along with 68% tilt toward European countries.

Looking at broader clean energy ETFs, the iShares Global Clean Energy ETF (NYSEArca: ICLN) country weights include U.S. 23.3%, China 16.6%, Hong Kong 15.1%, Spain 8.5% and Brazil 8.2%. The Market Vectors Global Alternative Energy ETF (NYSEArca: GEX) includes a large 59.0% tilt toward U.S. names, followed by Denmark 14.0% China 10.6%, Italy 4.7% and Japan 3.0%. Additionally, the PowerShares Global Clean Energy Portfolio (NYSEArca: PBD) has a 31.4% weight in U.S., 14.2% in China, 5.9% Germany, 5.1% Taiwan and 4.8% Denmark.

For more information on the energy sector, visit our energy category.