| EcoCing Corporation: A business founded upon improving public health, quality of life and energy substainability, located in Calgary, Alberta, Canada. Has information on "Dieselization." |
| Emissions Technology: Manufacturers of emission control products for diesel engines. |
| Red Mountain Engineering: Manufacturer of Smoke Check 1667 a diesel emissions testing solution. |
| Rotec Design Ltd.: Design and development company specializing in reducing diesel emissions from in service buses and trucks. |
| Tadger Group International: Site has information on the Tadger and how it helps to reduce emissions, increase horsepower and improve mileage of gasoline and diesel engines. |
| V&F Gas Analysis Systems, Inc.: Providing mass spectrometers to the automotive, process and quality control industries throughout North America, for gas emissions and research & development. |
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