The British supermarket said it had achieved the reductions by increasing its use of renewable power - now used 100% in the UK and 55% globally - as well as investing in energy efficiency.
In doing so, Teso says it has reduced its net carbon intensity per sq. ft. of retail and distribution floor space by 6% compared to the previous year.
These reductions mean that the supermarket is currently on track to reduce its emissions by 35% by 2020.
It also plans to source 65% of its power from renewables by 2020 and 100% by 2030.
“It is recognised that we need to work together across society to build a truly sustainable future and the business fully supports global efforts to build this future, including the UN Sustainable Development Goals and the Paris climate agreement,” said Lindsey Pownall, Tesco’s Corporate Responsibility Committee Chair.
“The new targets ensure that our supply chain and operations support (the agreement) to limit global temperature rises to 1.5 degrees Celsius this century, as well as our long-term ambition to become a zero-carbon business,” she added.
In the same report, Tesco also reported strong sales growth achieving GBP£51bn (US$69.1) in sales in the past year across its 6,800 worldwide stores.