Retrofitting Two-Stroke Engines Good For Everyone


An independent nonprofit out of Colorado has developed and disseminated a retrofit kit designed to reduce emissions from the ubiquitous two-stroke motorcycle taxis in the Philippines. A single motorcycle taxi with a traditional two-stroke engine emits as much pollution as 50 modern automobiles, and the Asian Development Bank estimates 100 million two-stroke vehicles ply the roads in Southeast Asia &mdash that’s right, the equivalent of 5 billion cars. The Worldwatch Institute reports that Envirofit has won a World Clean Energy Award for developing and disseminating a retrofit kit, originally designed for snowmobiles. In the retrofit, the carburetor is eliminated and fuel is introduced directly into the engine cylinder, so less unburned fuel is wasted. The typical Filipino taxi driver makes only $3–5 per day, and the kits pay for themselves in fuel savings within 10 months. Envirofit hopes to expand its engine retrofit program to Bangladesh, Sri Lanka, Pakistan, and India, where demonstrations of the product will take place this year.

Now, can we just do away with jetskis, the most hateful of all the 2-stroke blights? According to the EPA, older jetskis (still prevalent around the world) cause more nonpoint source pollution (translation: runoff) in two hours than a car running for an entire year. Truly fun for the feeble-minded. JULIA WHITTY

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