Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?

Cigarette butts contain cellulose acetate, a plastic polymer used as the filter, making them a major source of microplastic pollution. Modern eyeglass lenses are typically made of polymer plastics such as polycarbonate or CR-39 (allyl diglycol carbonate), rather than glass. Car tyres consist of natural and synthetic rubber, which includes synthetic polymers (plastics like styrene-butadiene), and tyre wear is a leading source of microplastic emissions. All three contain plastic.