translate English to French: PERSISTENT (degrades slowly) 1. some pesticides (e.g. DDT, dieldrin) 2. some leachate components from landfill sites (municipal, industrial) 3. petroleum and petroleum products 4. PCBs, dioxins, polyaromatic hydrocarbons (PAHs) 5. radioactive materials such as strontium-90, cesium-137, radium-226 and uranium 6. metals such as lead, mercury, cadmium  Persistent pollutants are the fastest growing type of pollution and they include substances that degrade very slowly or cannot be broken down at all.
Les substances rémanentes (dégradation lente) : 1. certains pesticides (p. ex. le DDT et la dieldrine), 2. certains produits de lixiviation provenant de lieux d'enfouissement (municipaux, industriels), 3. le pétrole et les produits pétroliers, 4. les BPC, les dioxynes, les hydrocarbures aromatiques polycycliques (HAP), 5. les matériaux radioactifs, tels que le strontium 90, le césium 137, le radium 226 et l'uranium, et 6. les métaux tels que le plomb, le mercure et le cadmium.