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- ...-out of that additive as converter-fitted cars became more prevalent. The lead emissions were highly damaging to human health, and its virtual elimination10 KB (1,533 words) - 09:02, 8 October 2009
- ...of gasoline and [[Tractor vaporising oil|kerosene]] was ended. Tetraethyl lead had the effect of poisoning catalytic carburetors. Many modern gasolines ap27 KB (4,310 words) - 17:26, 17 May 2011