ADA-ES, Inc. [ADES] Amanasu Environment Corporation [AMSU]
Bion Environmental Technologies, Inc. [BNET]
Calgon Carbon Corporation [CCC] CECO Environmental Corp. [CECE] CLARCOR Inc. [CLC] Clean Diesel Technologies, Inc. [CDTI]
Donaldson Company, Inc. [DCI] Duoyuan Global Water Inc.
ECOtality, Inc. [ECTY] Energy Recovery, Inc. [ERII] Euro Tech Holdings Company Limited [CLWT]
Fuel Tech, Inc. [FTEK]
GreenHunter Energy, Inc. [GRH]
Heritage-Crystal Clean, Inc. [HCCI]
MFRI, Inc. [MFRI] MPM Technologies, Inc. [MPML]
N-Viro International Corporation [NVIC]
Pacific Sands, Inc. [PFSD]
Sionix Corporation [SINX]
Tennant Company [TNC] Terralene Fuels Corporation [GSPT]
