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magine the following scenario, based on my
                                                                         research: A supermarket publishes its net-zero
                                                                         strategy and incentives designed to reward
                                                                         store managers for reducing the business’s
                                                                    I carbon emissions. Carbon KPIs that measure
                                                                     the emissions of each store are introduced into
                                                                     department scorecards and performance rankings
                                                                     published monthly. Each month the top three
                                                                     emission-reducing stores, as measured by their
                                                                     monthly store carbon emissions measure (SCEM),
                                                                     are spotlighted in staff magazines and webpages and
                                                                     awarded net-zero medals.
                                                                       In the first six months all stores report downward
                                                                     trends in their SCEM. But after nine months, the
                                                                     net-zero leader board was dominated by a small
                                                                     number of stores. Managers of the other stores
                                                                     expressed frustration that their SCEM performance
                                                                     remained stubbornly static despite initiatives such
                                                                     as encouraging staff to walk or cycle to work,
                                                                     stocking products with lower carbon footprints, and
                                                                     encouraging customers to reduce food waste and
                                                                     increase home composting.
                                                                       The performance management team started to
                                                                     analyse the SCEM data to identify elements of good
                                                                     practice to share throughout the business. The team
                                                                     noticed that the top-performing managers
                                                                     dramatically reduced the amount of produce
                                                                     purchased from farms owned and managed by the
                                                                     grocery company itself and switched to sourcing
                                                                     from overseas suppliers. In contrast, the worst-
                                                                     performing stores had increased their procurement
                                                                     from company farms and almost eliminated the
                                                                     amount purchased from overseas suppliers.
                                                                       This seems counterintuitive. Surely transporting
                                                                     produce from the other side of the world should
                                                                     increase carbon emissions, purchasing locally
                                                                     should reduce them, and this should be represented
                                                                     in the SCEMs.
                                                                       The problem lies in how the supermarket
                                                                     calculated the SCEM and how that was connected to
                                                                     incentives. Because the SCEM was not capturing all

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