Cirkel Rudolf
Ciuryla Vincent T.
Civitano Luigi
Claerbout Paul F.
Clark Antony David
Clark Noline C.
Claus Peter
Clausen, III Christian A.
Clay David T.
Clean Coal Power R&D Co., Ltd.
Clean Diesel Technologies, Inc.
Clean World Strategies Corp.
Clegg David E.
Cleland Randy S.
Clements Christopher James Philip
Cloutier Bernard
Clue
CO2-Norway AS
CO2CRC Technologies Pty Ltd.
Coal Tech Corporation