When the German chemist Dr Rudolph Diesel first introduced his diesel engine to the world at the end of the 19th century it was considered a major advance to industry. The engine's high thermal efficiency meant it burnt less fuel than a gasoline engine and, because of the diesel engine's more efficient lubrication abilities, the engines would last longer. But, as we have learned over the years, emissions from carbon-based products such as the diesel engine also have significant negative effects on human health.
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