Delegates from around the world have agreed to add two plastics additives and a pesticide to the Stockholm Convention on Persistent Organic Pollutants, an international treaty that lists toxic substances for global elimination. The agreement was reached during a 2-week meeting that wrapped up May 12 in Geneva. The two plastics chemicals are the flame retardant Dechlorane Plus and the ultraviolet stabilizer UV-328. The targeted pesticide is methoxychlor. All three chemicals meet the criteria for inclusion in the treaty: they are persistent, bioaccumulative, and harmful to human health and the environment, the delegates found. Environmental advocates welcome the decision to add the three chemicals to the Stockholm Convention but point out that exemptions will allow continued use of the plastics additives. The agreement is an important step “toward protecting human health and the environment from three chemicals linked to serious health conditions and threats to biodiversity,” Sara Brosché, a science