We can look at natural experiments like England's switch away from coal gas, or the introduction of catalytic convertors, and the decline in rates of suicide in

We can look at natural experiments like England's switch away from coal gas, or the introduction of catalytic convertors, and the decline in rates of suicide in the years afterwards. Both these events removed popular methods. https://www.youtube.com/watch?v=iWPEVhrWZS0 https://www.youtube.com/watch?v=iWPEVhrWZS0 Start at 6:50 for reducing access to means and methods.