Lead poisoning once caused an average IQ drop of 5% to 15% in American children, according to statistics from the World Health Organization. Furthermore, the reality is far more exaggerated; it is not an exaggeration to say that the invention of one thing has exposed billions of people around the world to environments with excessive lead content.

This was caused by tetraethyl lead, invented by American scientist Thomas Midgley.

The gasoline we use today, whether it’s 90 octane or 80 octane, refers to its octane rating. At that time, lead was added to increase its octane rating. In simple terms, it was added to make car engine noise quieter.

From 1920 to 1996, the U.S. added this lead to gasoline. Gasoline burned, but all the lead was released into the living environment, leading to very serious consequences.

This invention has also been rated by the New England Journal of Medicine as one of the most disastrous inventions in the history of industrial civilization, specifically the addition of tetraethyl lead to gasoline.

Many times it is like this: a superficial solution to one problem actually creates a much larger problem.

The same goes for food, drink, and daily necessities. Especially for children who are still in their developmental stage, it is truly hard to guard against.