Passage: Suicide prevention is a term used for the collective efforts to reduce the incidence of suicide through preventative measures. Reducing access to certain methods, such as firearms or toxins such as opioids can reduce risk. Other measures include reducing access to charcoal (for burning) and adding barriers on bridges and subway platforms. Treatment of drug and alcohol addiction, depression, and those who have attempted suicide in the past may also be effective. Some have proposed reducing access to alcohol as a preventative strategy (such as reducing the number of bars). Although crisis hotlines are common there is little evidence to support or refute their effectiveness. In young adults who have recently thought about suicide, cognitive behavioral therapy appears to improve outcomes. Economic development through its ability to reduce poverty may be able to decrease suicide rates. Efforts to increase social connection, especially in elderly males, may be effective. The World Suicide Prevention Day is observed annually on September 10 with the support of the International Association for Suicide Prevention and the World Health Organization. Preventing childhood trauma provides an opportunity for suicide prevention.

Question: What type of substance was given a reduced access as an attempt to prevent suicides?
alcohol