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What happens when a car starts in the cold? — ScienceDaily

During cold-start, a car engine emits far more particulate matter and other pollutants than during warm conditions. This is because a cold catalytic converter is much less efficient at low exhaust gas temperatures. So what’s the answer? Preheat the car with microwaves. Empa scientists have developed the first microwave converter heating for passenger car applications. […]

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Global levels of ethane and propane in the atmosphere have been underestimated by more than 50% — ScienceDaily

Global levels of ethane and propane in the atmosphere have been underestimated by more than 50%, new research involving scientists at the University of York has revealed. These hydrocarbons are particularly harmful in large cities where, through chemical reactions with emissions from cars, they form ozone — a greenhouse gas which is a key component […]

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