In energy and air: the organic compounds that persist in the environment, bioaccumulate through the food web, and pose a risk of causing adverse effects to human health and environment. These compounds resist photolytic, chemical and biological degradation, which shall include but not be limited to dioxin, furan, Polychlorinated Biphenyls (PCBs), organochlorine pesticides, such as adlrin, dieldrin, DDT, hexachlorobenzene, lindane, toxaphere and chlordane [Section 5(s), Philippine Clean Air Act of 1999]