Sainsbury's Supermarkets Ltd is a leading retail chain in the United Kingdom, operating in the supermarkets sector. The company was founded in 1869 by John James Sainsbury and has since grown to become one of the largest supermarket chains in the UK, with over 1,400 stores and more than 180,000 employees.

Sainsbury's has a strong commitment to sustainability and decarbonisation, and has set ambitious targets to reduce its carbon emissions and increase its use of renewable energy. The company has been working towards these goals for many years, and has made significant progress in reducing its carbon footprint.

One of the key ways in which Sainsbury's is working to reduce its carbon emissions is through its corporate energy strategy. The company has implemented a range of energy-saving measures across its stores and distribution centres, such as LED lighting, energy-efficient refrigeration systems, and smart building management systems. These initiatives have helped Sainsbury's to reduce its energy consumption by over 30% since 2005, and have saved the company millions of pounds in energy costs.

In addition to these energy-saving measures, Sainsbury's is also investing in renewable energy. The company has installed solar panels on the roofs of many of its stores, and has also invested in wind power and biomass energy. These renewable energy sources now provide around 20% of the company's electricity needs, and Sainsbury's is committed to increasing this figure in the coming years.

One of the most innovative ways in which Sainsbury's is investing in renewable energy is through corporate power purchase agreements (PPAs). A corporate PPA is a long-term agreement between a company and a renewable energy provider, in which the company agrees to purchase a certain amount of renewable energy at a fixed price over a set period of time. This provides the renewable energy provider with a stable income stream, and allows the company to secure a reliable source of renewable energy.

Sainsbury's has signed several corporate PPAs in recent years, including agreements to purchase wind power from farms in Scotland and Wales, and solar power from a large-scale solar farm in the south of England. These agreements have helped Sainsbury's to increase its use of renewable energy, while also supporting the growth of the renewable energy sector in the UK.

Overall, Sainsbury's is a company that is committed to sustainability and decarbonisation, and is taking a proactive approach to reducing its carbon footprint and increasing its use of renewable energy. Through its corporate energy strategy, investment in renewable energy, and use of corporate PPAs, Sainsbury's is leading the way in the supermarkets sector and demonstrating that it is possible to operate a successful business while also protecting the environment.