Plastic permeates modern life, but a landmark Lancet Planetary Health study forecasts their health toll doubling by 2040 under business-as-usual, erasing 83 million healthy life years globally from 2016-2040. Open waste burning follows, spewing toxins tied to cancers. Combined reforms shine brightest: slash virgin output, ban open burning, boost smart recycling, and substitute sparingly—cutting 43% DALYs by 2040. Cut virgin plastic, end burning, smart recycling—43% DALY drop possible. As 175 nations craft a Global Plastics Treaty, Lancet data demands bold production limits over half-measures.