The World Health Organization (WHO) says Sri Lanka is the best-studied country to prove that regulations to prohibit the use of highly hazardous pesticides can lead to reductions in national suicide rates.A WHO publication issued yesterday (09), for the World Suicide Prevention Day on 10 September, read that a series of such bans in Sri Lanka has led to a 70% fall in suicides and an estimated 93 000 lives saved between 1995 and 2015.