Scientists tell us that greenhouse gases released by human activities cause climate change. When organic materials like food scraps and yard waste are landfilled, they break down anaerobically (without oxygen). This creates methane - a greenhouse gas 84x more potent than carbon dioxide (CO2). Landfills are the 3rd largest source of methane emissions in California according to CalRecycle. Reducing short-lived climate superpollutants like methane will have the fastest impact on the climate crisis and the health of our planet.