structural:expansion, structural:scholar_edition
Environment

In 2011, Greenpeace released a report rating the top ten big brands in cloud computing on their sources of electricity for their data centers. At the time, data centers consumed up to 2% of all global electricity, and this amount was projected to increase. Phil Radford of Greenpeace said, "We are concerned that this new explosion in electricity use could lock us into old, polluting energy sources instead of the clean energy available today," and called on "Amazon, Microsoft and other leaders of the information-technology industry must embrace clean energy to power their cloud-based data centers." In 2013, Microsoft agreed to buy power generated by a Texas wind project to power one of its data centers.

Microsoft is ranked on the 17th place in Greenpeace 's Guide to Greener Electronics (16th Edition) that ranks 18 electronics manufacturers according to their policies on toxic chemicals, recycling, and climate change. Microsoft's timeline for phasing out brominated flame retardant (BFRs) and phthalates in all products was 2012 but its commitment to phasing out PVC is not clear. As of January 2011, it has no products that are completely free from PVC and BFRs.

Microsoft's main U.S. campus received a silver certification from the Leadership in Energy and Environmental Design (LEED) program in 2008, and it installed over 2,000 solar panels on top of its buildings at its Silicon Valley campus, generating approximately 15 percent of the total energy needed by the facilities in April 2005. Microsoft makes use of alternative forms of transit. It created one of the world's largest private bus systems, the "Connector," to transport people from outside the company; for on-campus transportation, the "Shuttle Connect" uses a large fleet of hybrid cars to save fuel. The "Connector" does not compete with the public bus system and works with it to provide a cohesive transportation network not just for its employees but also for the public.

Microsoft also subsidizes regional public transport, provided by Sound Transit and King County Metro, as an incentive. In February 2010, however, Microsoft took a stance against adding additional public transport and high-occupancy vehicle (HOV) lanes to the State Route 520 and its floating bridge connecting Redmond to Seattle; the company did not want to delay the construction any further. Microsoft was ranked number 1 in the list of the World's Best Multinational Workplaces by the Great Place to Work Institute in 2011.

In January 2020, the company announced a strategy to take the company carbon negative by 2030 and to remove all carbon that it has emitted since its foundation in 1975. On October 9, 2020, Microsoft permanently allowed remote work. In January 2021, the company announced on Twitter to join the Climate Neutral Data Centre Pact, which engages the cloud infrastructure and data centers industries to reach carbon neutrality in Europe by 2030, and also disclosed an investment in Climeworks, a direct air capture company partnered with Carbfix for carbon sequestration. In the same year, it was awarded the EPA's Green Power Leadership Award, citing the company's all-renewable energy use since 2014.

In September 2023, Microsoft announced that it purchased $200 million in carbon credits to offset 315,000 metric tons of carbon dioxide over 10 years from Heirloom Carbon, a carbon removal company that mixes calcium oxide from heated crushed limestone with water to form carbon hydroxide to absorb carbon dioxide from the atmosphere to mineralize back into limestone while the released carbon dioxide is stored underground or injected into concrete. Despite spending spent more than $760 million through its Climate Innovation Fund by June 2024 on sustainability projects—including purchases of more than 5 million metric tonnes of carbon dioxide removal with carbon offsets and more than 34 megawatts of renewable energy—Microsoft's Scope 3 emissions had increased by 31% from the company's 2020 baseline, which caused the company's total emissions to rise by 29% in 2023.

In 2023 Microsoft consumed 24 TWh of electricity, more than countries such as Iceland, Ghana, the Dominican Republic, or Tunisia.