Top Green Investment Opportunities

Water Stocks

Invesco Water Resource Portfolio ETF (PHO)
Invesco Global Water Portfolio ETF (PIO)
First Trust ISE Water Index Fund (FIW)
iShares Dow Jones U.S. Utilities Index ETF (IDU)
Summit Zacks Global Water Index (ZAXWTRX)
Invesco S&P Global Water Index ETF (CGW)
PG&E Corp. (PCG)
Idacorp (IDA)
Brookfield Renewable Partners LP (BEP)
AllianzGI Global Water Fund (AWTAX)
Calvert Global Water Fund (CFWAX)
ITT Industries (ITT)
Aqua America (WTR)
American Water Works (AWK)

Wind Power

General Electric (GE)First Trust ISE Global Wind Energy Index Fund (FAN)
NextEra Energy Partners LP (NEP)
Siemens Gamesa (GCTAY)
Vestas Wind Systems (VWDRY)

Solar Energy

First Trust ISE Global Wind Energy Index Fund (FAN)
NextEra Energy Partners LP (NEP)
Siemens Gamesa (GCTAY)
Vestas Wind Systems (VWDRY)
Solar EnergyFirst Solar (FSLR)
JinkoSolar Holding Co. Ltd. (JKS)
Sunpower Corp. (SPWR)
Enphase Energy, Inc. (ENPH)
Sunrun (RUN)
Vivint Solar (VSLR)
Guggenheim Solar ETF (TAN)

Pollution Controls

Fuel-Tech (FTEK)
Versar (VSR)
Market Vectors Environmental Services ETF (EVX)
Invesco Cleantech (PZD)

Green Transportation

Tesla (TSLA)
Ballard Power Systems (BLDP)
Fuel Cell Energy (FCEL)

Waste Reduction

Allied Waste Industries (AW)
Waste Management (WMI)
Covanta Holding Corp. (CVA)

Organics

Whole Foods Markets (WFMI)
United Natural Foods (UNFI)
NBTY (NTY)

Aquaculture

Marine Harvest ASA (MNHVF)

Geothermal

Calpine Corp. (CPN)
Ormat Technologies Inc. (ORA)
U.S. Geothermal Inc. (HTM)

Source: https://www.investopedia.com/articles/stocks/07/green-industries.asp#top-environmental-policies