Related by context. Frequent words. (Click for all words.) 59 Clean Diesel Technologies 55 Ceramic Fuel Cells 54 Ensyn 54 Catalytica Energy Systems 53 Westport Innovations Inc. 52 Symyx Technologies 51 Cummins Westport Inc. 51 Porvair 51 MKS Instruments 50 Measurement Specialties 50 Dyesol 50 Trading Emissions 49 Ze gen 49 AXYS Design Automation 49 Clean Diesel 48 Marsulex 48 Nova Biosource Fuels 48 Codexis 48 TSX WPT 47 NYSE Arca EEE 47 Xebec 47 Cummins Westport 47 ADA ES 47 Stanelco 47 Novomer 47 5N Plus 46 Nordic Windpower 46 Astrata Group 46 BioCentric Energy Holdings 46 Imperial Innovations 46 Umeco 46 Alter NRG 46 Axial Vector Energy 46 Particle Drilling Technologies 46 Altair Nanotechnologies 46 Fuel Cell Technologies 46 Cogent Systems 46 Oxonica 46 Sagentia 46 Cereplast Inc. 46 Hydrodec 45 EcoloCap 45 EarthFirst 45 Renegy 45 Amerityre 45 TurboSonic 45 BlueFire Ethanol 45 Hydrogenics Corporation 45 Curtiss Wright Corporation 45 Syngas 45 Selective Catalytic Reduction SCR 45 Carclo 45 Terrane Metals Corp. 45 CytoGenix 45 Advanced Photonix 44 SulphCo 44 Veridium 44 O2Diesel 44 EcoMotors 44 Control Components 44 Westport Innovations 44 HyPower 44 Applied Films 44 CFCL 44 Cymat 44 SatCon 44 GBRC 44 Technologies 44 ECD Ovonics 44 ITM Power 44 Rotork 44 Plantic 44 Victrex 44 Spirax Sarco 43 Voltaix 43 Avantium 43 Comtech EF Data 43 Toumaz 43 BIOX 43 Altair Nanotechnologies Inc. 43 Syntroleum Corporation 43 Yule Catto 43 QuantumSphere 43 NYSE CMI 43 Dynamic Fuels 43 Ionics 43 Enerkem 43 gas recirculation EGR 43 NASDAQ BLDP 43 Torotrak 43 QuestAir 43 GPRE 42 Spirit Aerosystems Holdings 42 InfrastruX 42 Gasco Energy 42 PetroAlgae 42 Thermacore 42 Intercytex 42 Sontra 42 Rentech 42 plasma gasification