• Methane is 25× more potent than CO₂
• Recycling coffee grounds prevents these emissions
• 60 Mt (million tons) produced annually • Represents ~1% of all food waste by mass
• Food waste contributes 10% of total landfill emissions • Total landfill emissions: 110 Mt CH₄ annually
• Coffee grounds: ~0.11 Mt CH₄ per year • Methane has 25× global warming potential • Final impact: 2.75 Mt CO₂ equivalent
Higher concentration creates darker, richer appearance
Lower concentration results in lighter, subtle texture