DaimlerChrysler Corporation is tapping waste gases from the decomposition of landfill trash to provide power for its two St. Louis, Missouri, assembly plants. The landfill gas contains 50 percent methane, a renewable fuel source that otherwise goes to waste. Methane is also a greenhouse gas, so the project will reduce use of fossil fuels and eliminate a source of greenhouse gas emissions. To use the captured gases, DaimlerChrysler will convert two of the four boilers in its St. Louis plant powerhouse.