GHG methodology revised in 2022-2023 From 2022 to 2023 Aon revised its methodology. The figures presented for 2022 and 2023 are calculated using this revised methodology. Per the GHG Protocol, Aon rebaselines calculations in the event of a change in methodology that would result in a 5% or greater change in base year emissions.
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Enhanced ERM definitions for ESG risks In 2023, Aon enhanced certain Enterprise Risk Management (ERM) definitions to further address ESG and climate-related risks.
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Net zero by 2030 commitment reaffirmed Aon remains committed to achieving net-zero carbon emissions by 2030, managed through travel, commuting, real estate, investments and supply chain.
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Primary: Business travel reduction and Sustainable Aviation Fuel Aon controls its direct operations emissions through thoughtful travel and its Smart Working strategy. The firm invests in innovative solutions such as a Sustainable Aviation Fuel (SAF) pilot program to reduce the impact of air travel emissions, which is one of its dominant Scope 3 categories.
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Dependent: Employee commuting via Smart Working Smart Working — offering home, office or hybrid working — is positioned as both an engagement lever and a way to manage commuting-related emissions. The firm cites commuting as one of the key drivers of its total footprint.
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Primary: Real estate energy efficiency programme via JLL partnership Aon has implemented a Global Energy Program in partnership with JLL to capture Scope 1 and 2 utility data across all buildings and manage energy consumption through a single global reporting platform. A benchmarking exercise identified 'Priority Locations' where Energy Usage Intensity exceeds best practice; formal action plans are underway. Initiatives include LED lighting upgrades across global offices, consumption deviation investigation and resolution, and energy/environmental 'Good Catches' by FM teams. Aon also procures 100% renewable electricity where available in deregulated utility markets.
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Re-baselined emissions inventory to 2023 Aon re-baselined its carbon emissions inventory to fiscal 2023 driven by NFP acquisition and methodology updates including new CEDA emission factor database for 2024 calculations.
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Revised Scope 3 methodology (2022-2023) Revised methodology for Scope 3 Cat 1 (purchased goods), used radiative forcing factors for Cat 6 (business travel), updated Cat 7 (commuting/WFH), included primary emissions, and adjusted real-estate portfolio to Scopes 1 and 2 from Scope 3.
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SAF purchase - 48,000 gallons consumed in October 2023 Aon purchased a SAF volume of 48,000 gallons in 2022; fuel was consumed in October 2023. Part of collaboration with Amex GBT & Shell. Resulted in 403.378 tCO2 biogenic emissions with 74.72% GHG reduction vs. fossil jet fuel comparator.
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Renewable electricity procurement via project-specific contracts across 9+ countries Aon has adopted a centralized approach to procurement of utilities in deregulated markets, with a key component being to procure 100% renewable electricity where possible/available. In 2023, Aon purchased renewable energy equivalent to 7,608 tCO2e (its first year of renewable purchases), sourcing wind energy via project-specific contracts in Italy, Australia, Spain, Netherlands, India, Denmark, UK, and Germany, and a retail green electricity contract in New Zealand. Renewable electricity represents approximately 34% of total electricity consumed (29,223 MWh of 85,738 MWh total). The market-based Scope 2 figure (24,099 tCO2e) is lower than location-based (30,714 tCO2e) reflecting these renewable energy attributes.
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