Assertion: cerium's use | /r/HasProperty | a point of study and dispute
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text: Major automotive applications for cerium(III) oxide are, as a catalytic converter for the oxidation of CO and NOx emissions in the exhaust gases from motor vehicles, and secondly, cerium oxide finds use as a fuel additive to diesel fuels, which results in increased fuel efficiency and decreased hydrocarbon derived particulate matter emissions, however the health effects of the cerium oxide bearing engine exhaust is a point of study and dispute.