The San Francisco Bay Area Rapid Transit District (BART) is a public transportation agency that provides rapid transit services in the San Francisco Bay Area. Established in 1957, BART is the fifth-busiest heavy rail rapid transit system in the United States, serving over 400,000 passengers on weekdays. The agency operates a network of five lines, spanning 112 miles, and serving 48 stations across four counties.

BART is committed to decarbonisation and reducing its carbon footprint. The agency has set a goal to achieve net-zero emissions by 2045. To achieve this goal, BART has implemented a comprehensive decarbonisation strategy that includes several initiatives, such as electrifying its fleet, reducing energy consumption, and increasing the use of renewable energy.

One of the key initiatives of BART's decarbonisation strategy is the electrification of its fleet. Currently, BART operates a fleet of 669 railcars, which are powered by electricity. The agency plans to replace its existing fleet with new railcars that are more energy-efficient and have lower emissions. The new railcars will be equipped with regenerative braking technology, which will enable them to recover energy during braking and use it to power the trains.

BART is also focused on reducing its energy consumption. The agency has implemented several energy-saving measures, such as upgrading lighting systems, installing energy-efficient HVAC systems, and optimizing train schedules. These measures have helped BART reduce its energy consumption by 10% since 2013.

To increase the use of renewable energy, BART has entered into several corporate power purchase agreements (PPAs). In 2018, the agency signed a 20-year PPA with Recurrent Energy to purchase 61 MW of solar energy from a new solar farm in Central California. The solar farm will provide enough energy to power BART's entire system, making it the first transit agency in the United States to achieve 100% renewable energy.

BART has also implemented several other renewable energy projects, such as installing solar panels on station roofs and parking lots. The agency has installed over 4,000 solar panels at its maintenance facility in Hayward, which generate enough energy to power 1,000 homes. BART has also installed solar panels at its station in Antioch, which generate enough energy to power the station and its parking lot.

BART's commitment to decarbonisation and renewable energy has earned the agency several awards and recognitions. In 2018, BART was awarded the Green Power Leadership Award by the U.S. Environmental Protection Agency (EPA) for its leadership in using renewable energy. The agency was also recognized by the American Public Transportation Association (APTA) for its sustainability efforts.

BART's commitment to corporate energy and renewable energy has also had a positive impact on the environment and the community. By reducing its carbon footprint and increasing the use of renewable energy, BART is helping to reduce air pollution and mitigate the effects of climate change. The agency's renewable energy projects have also created jobs and economic opportunities in the communities where they are located.

In conclusion, the San Francisco Bay Area Rapid Transit District (BART) is a public transportation agency that is committed to decarbonisation and reducing its carbon footprint. The agency has implemented several initiatives, such as electrifying its fleet, reducing energy consumption, and increasing the use of renewable energy, to achieve its goal of net-zero emissions by 2045. BART's commitment to corporate energy and renewable energy has earned the agency several awards and recognitions and has had a positive impact on the environment and the community.