I commented a couple of weeks ago about unintended consequences and used the “banning” of DDT as an example. As much as you believe that I am never wrong, in this case I may have overstated the case. Or maybe not.
It has been pointed out that first of all, DDT wasn’t actually “banned” in many countries and has been used to keep mosquitoes at bay. However overuse may have led to DDT resistant mosquitoes, thus causing other issues.
As you can see, there is a lot of differing information, and it’s not easy to sort out.