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Nissan has developed a new catalyst for its gasoline-powered cars that requires only half the amount of precious metals that current designs call for. The catalyst or catalytic converter is a piece of the exhaust system filled with a mix of platinum, rhodium and palladium that captures harmful ...
The Environmental Protection Agency is considering a variety of rules that it might apply to urea injection for diesel engines, and is said to ready to issue rules for such emission-control devices in upcoming weeks. The regulations are expected to address potential issues arising with urea ...