Mapadi osanjikiza ndi njira yabwino yothetsera zitini, magalasi ndi mabotolo a PET. Kwa zaka zopitilira 30 zaukadaulo wathu ndi zogulitsa zathu zakhala zikuvomerezedwa ndi omwe akutenga nawo gawo pamsika (opanga makontena, zodzaza, zofukiza, ndi zina). Anthu makumi asanu ndi limodzi a iwo -okhala ku Europe, Africa, Central America ndi Oceania- ayika kale chidaliro chawo mwa ife.