5 ms·

Wasn't this kind of debunked?

• ghaff 8y ago
  No. The general conclusion seems to be that lead wasn't the only thing related to the decline of violent crime in the US but it was probably a significant factor.
  • nabla9 8y ago
    The evidence is not only from the US. It's from all over the world. Different developed countries have moved to unleaded different times and their violent crime rates decline as well.