Made by combining arsenic trioxide and coper acetate This was called Paris

Made by combining arsenic trioxide and coper acetate

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- Made by combining arsenic trioxide and coper acetate. - This was called “Paris Green” Why? Because it used to rid the sewers of Paris of rats and mice. And green because its green. It was actually sold as a pigment and used in paints. This was problematic. Sometimes wallpaper was dyed with Paris Green and some arsenic compounds would evaporate out of the paper. There is a theory that Napoleon was poisoned because in his prison cell there was either paint or wallpaper that had been formulated with Paris Green. Today Paris green is rarely used. DDT: - Synthetic pesticide. - Introduced in the middle of the 20 th century. Manufactured by chemists in a laboratory and it was very effective against all kinds of insects. - Various versions of DDT produced. - Helped shape the outcome of the Second World War: Allied soldiers were sprayed with DDT so that they would be free of lice and insects that could transmit typhoid fever. The WHO estimates that up to the end of the Second world War, about 25 million lives saved because of the use of DDT. - Paul Muller: Physician who introduced DDT, received the Nobel Prize for this in 1948. Problem: Too good and too efficient. Farmers overused DDT. It was even sprayed on beaches to get rid of mosquitos! The first problem that was noted was that the eggshells that were laid by birds, broke too frequently so that there were fewer hatchings, and we began to see a decline in the population of the eagle and the osprey. This was brought to our attention by Rachel Carson. In her book “Silent Spring” she introduced the idea that pesticides were really a double -edged sword, and you had to be very careful about how you use them. She explained how DDT builds up in the food chain, but it isn’t biodegradable , and it gets
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Malka A-R into the water. Pretty soon, there’s a buildup and then you have problems with the eggs, the birds, etc. This is an environmental issue. There was no clear-cut evidence that DDT was causing humans any harm, but because of its accumulation in the environment, by 1969, it was banned in Canada and In 1972, it was banned in the U.S. They were so quick to ban these because they felt that there were better pesticides alternatives, so DDT wasn’t so crucial. In 2006, the WHO suggested that DDT be used to control malaria in Africa; DDT will kill the mosquitos that transmit malaria. You can use DDT in a safe and efficient way by spraying a powdered version on the inside of homes, not by randomly spraying everywhere. This has shown to cut down the incidence of malaria. How dangerous was DDT? If you investigate scientific literature, you can find so many different findings - “Rats exposed to DDT develop fewer liver tumors than unexposed rats”: Turns out that the exposure to DDT causes the animal to generate some detoxicating enzymes that will then detoxicate other substances as well.
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  • Spring '11
  • Multiple
  • Silent Spring, Food coloring, Sucralose, Sugar substitute, E number, Food additive, Malka

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