Isabella Walker

1. San Francisco, United StatesSan Francisco launched curbside recycling in the early 1980s and emerged as the initial major American municipality to make composting and recycling mandatory for every resident and business by 2009. The municipality's Zero Waste Ordinance mandates the segregation of recyclables, compostable materials, and refuse destined for landfills.The city consistently reports landfill diversion rates above 80 percent, among the highest in North America. Success is driven by:Pay-as-you-throw pricingMandatory sorting with enforcement finesPublic-private partnership with RecologyExtensive composting infrastructureSan Francisco demonstrates how regulation, infrastructure investment, and community engagement can work together over decades.2. Tokyo, JapanTokyo’s organized recycling framework traces…