The news can be depressing so I thought we could use a bit of good cheer. The United Nations announced that the world has finally eliminated the use of leaded gasoline. Algeria was the last country to do so in July.
When in 1921 engineers at General Motors discovered that adding lead to gasoline improved engine performance, it was already known that lead was toxic but they went ahead with it anyway, arguing that small amounts were not harmful. That was wrong. It became increasingly realized that the copious amounts of lead that were being released into the atmosphere was finding its way into people, leading to all manner of problems, including lower IQ and a propensity for violence. (I wrote about this back in 2014.)
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