when did they take lead out of gas
Tetraethyllead By 2011, the United Nations announced that it had been successful in phasing out leaded gasoline worldwide. "Ridding the world of leaded petrol, with the United Nations leading the effort in developing countries, has resulted in $2.4 trillion in annual benefits, 1.2 million fewer premature deaths, higher overall intelligence and 58 million fewer crimes," the United Nations Environmental Programme said.[73][74] The announcement was slightly premature, as a few countries still have leaded gasoline for sale as of 2013 (see above).
Nuclear transmutation It transpired that, under true nuclear transmutation, it is far easier to turn gold into lead than the reverse reaction, which was the one the alchemists had ardently pursued. Nuclear experiments have successfully transmuted lead into gold, but the expense far exceeds any gain.[9] It would be easier to convert lead into gold via neutron capture and beta decay by leaving lead in a nuclear reactor for a long period of time.