Aya Gold & Silver publishes 2025 GHG emissions calculation methodology report

• Aya Gold & Silver issued its 2025 greenhouse-gas accounting methodology, setting boundaries for Scope 1, 2, 3 emissions under the GHG Protocol.
• Scope 1 coverage centers on diesel use in mobile equipment, fugitive refrigerant losses, explosive detonation treated as direct process emissions.
• Explosives factors set at 0.22 kg CO2 per kg ANFO, 0.14 kg CO2e per kg emulsion, based on mass-balance assumptions.
• Scope 2 uses a market-based method tied to supplier factors: ONEE 0.601 kg CO2e/kWh, NAREVA 0.0146 kg CO2e/kWh.
• Scope 3 focuses on six upstream categories, led by spend-based estimates for purchased goods and capital goods, using ADEME Bilan Carbone factors.

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