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Keeping your car’s emissions system healthy

Your car’s emission control system isn’t just about passing smog tests—it’s about keeping your engine efficient, your fuel bills lower, and the air cleaner. From EGR valves to MAP sensors, oxygen ...
The Daily Galaxy on MSN

Forget lithium batteries: Scientists built a dirt-powered fuel cell that runs forever

A sensor buried in a farm field has two ways to stay powered. A battery that will die. Or a solar panel that will get caked ...