Tesco last year cut net carbon emissions by 13%, according to its annual report.
The company said it had achieved the reductions by increasing procurement of renewable power – now 100% in the UK and 55% globally – plus investing in energy efficiency.
The outcome is a reduction in net carbon intensity per square foot of retail and distribution floor space of 6% year on year, according to the firm.
Tesco said its net carbon footprint was 3.42 million tonnes of carbon dioxide equivalent (CO2e) in 2017/18 versus 3.89m CO2e the prior year.
The company has set targets in line with the Paris Agreement to reduce carbon emissions 35% by 2020, 60% by 2025 and 100% by 2050 versus 2015/16 levels.
It also plans to source 65% of power from renewables by 2020 and 100% by 2030.
See the annual report here.