This document discusses plastics, their composition, uses, and potential health risks. It notes that plastics are mostly made from petrochemicals and can contain additives, fillers, and colors. There is conflicting evidence on the safety of plastics, but some potential health hazards include toxicity from additives, leaching of chemicals like BPA and phthalates, and hormonal disruption. The document recommends using food-grade plastics and avoiding reheating plastics in the microwave when possible to minimize exposure to chemicals from plastic.