Hannon Armstrong Sustainable Infrastructure Capital, Inc. (HASI) is a leading investor in climate change solutions, primarily focusing on sustainable infrastructure projects. The company generates revenue by providing capital to projects that reduce carbon emissions or increase resilience to climate change, such as renewable energy, energy efficiency, and sustainable infrastructure assets. Founded in 1981, HASI has a rich history of pioneering investments in environmental solutions and became the first U.S. public company solely dedicated to investments in climate change solutions in 2013. Their innovative approach and commitment to sustainability make them a significant player in the transition to a low-carbon economy.