All three items—cigarette butts, eyeglass lenses, and car tyres—contain plastic, which is a synthetic polymer derived from petrochemicals. Cigarette butts often incorporate cellulose acetate, a type of plastic, in their filter tips, while eyeglass lenses are frequently made from polycarbonate or other plastic materials for their optical properties. Car tyres, too, consist of synthetic rubber, which is a plasticized material, emphasizing the pervasive use of plastics across various products. This highlights the environmental implications of plastic waste and the need for sustainable practices, relevant topics in ecological and environmental studies, which are crucial for UPSC examinations.