4 ms·

There is almost definitely a small, negligible amount of lead in the solder in them. Eg NASA requires a small (single digit I think) percentage of lead to preve

• JumpCrisscross 1y ago
  > almost definitely a small, negligible amount of lead in the solder in them Emphasis on negligible. Assuming 0.07 to 0.28 ppm lead [1] in meteoroids, space is dosing us with half to 2 kg a year [2]. [1] https://www.sciencedirect.com/science/article/abs/pii/001670376090079X https://www.sciencedirect.com/science/article/abs/pii/001670... [2] https://earthsky.org/space/tons-of-extraterrestrial-dust-fall-to-earth-each-year/#:~:text=Bottom%20line%3A,each%20year. https://earthsky.org/space/tons-of-extraterrestrial-dust-fal...