Equity Residential is a real estate investment trust (REIT) that focuses on the development, acquisition, and management of high-quality apartment properties in the United States. The company was founded in 1969 and is headquartered in Chicago, Illinois. Equity Residential has a portfolio of over 300 properties, totaling more than 80,000 units, located in some of the most desirable markets in the country.

As a leading player in the apartment REIT sector, Equity Residential is committed to sustainability and decarbonisation. The company recognizes that the real estate industry has a significant impact on the environment, and is taking steps to reduce its carbon footprint and promote renewable energy.

One of the ways that Equity Residential is working towards decarbonisation is through corporate energy management. The company has implemented a comprehensive energy management program that includes energy audits, benchmarking, and the installation of energy-efficient equipment and systems. Equity Residential has also invested in renewable energy technologies, such as solar panels and wind turbines, to generate clean energy on-site.

Another key aspect of Equity Residential's sustainability strategy is corporate power purchase agreements (PPAs). PPAs are long-term contracts between a renewable energy developer and a corporate buyer, in this case, Equity Residential. Under a PPA, the developer agrees to sell the buyer a certain amount of renewable energy at a fixed price over a specified period of time. PPAs allow companies to access renewable energy without having to invest in the infrastructure themselves.

Equity Residential has entered into several corporate PPAs to support its renewable energy goals. In 2019, the company signed a 10-year PPA with a wind farm in Illinois, which will provide 25% of the electricity needed to power its properties in the state. Equity Residential has also signed a PPA with a solar developer in California, which will supply 80% of the electricity needed to power its properties in the state.

In addition to its focus on decarbonisation and renewable energy, Equity Residential is committed to sustainability in other areas as well. The company has implemented a comprehensive recycling program at its properties, and has set a goal to achieve zero waste by 2030. Equity Residential also promotes sustainable transportation options, such as bike storage and electric vehicle charging stations, at its properties.

Overall, Equity Residential is a leader in the apartment REIT sector when it comes to sustainability and decarbonisation. The company's commitment to corporate energy management, corporate PPAs, and renewable energy technologies is helping to reduce its carbon footprint and promote clean energy. As the real estate industry continues to evolve, Equity Residential is well-positioned to lead the way in sustainable development and management.