translate English to French: This can only be achieved by identifying where the contaminants are coming from and by reducing or eliminating their use at these sources through international agreements, such as the Stockholm Convention, that would limit production and use of these contaminants.
Pour ce faire, il faut déterminer la provenance des contaminants, et réduire ou éliminer leur utilisation à la source. Il faut donc conclure des ententes internationales, telles que la Convention de Stockholm qui limiteraient la production et l'utilisation de ces contaminants.