Lightweight plastic bags are often used only once, but can persist in the environment for hundreds of years, often as harmful microscopic particles that are known to be dangerous to marine life in particular.
Õhukesi kilekotte kasutatakse sageli ainult üks kord, kuid need säilivad keskkonnas sadu aastaid, seda tihti kahjulike mikroskoopiliste osakeste näol, mis on teadaolevalt ohtlikud eelkõige mereelustikule.