Alstom is an integrated power plant, power production services, and air quality control systems company, as well as a supplier of rolling stock, transport infrastructure, maintenance equipment, and global rail systems. Alstom works with all forms of energy — coal, gas, nuclear, fuel-oil, hydropower, wind — and promotes environmental protection in the form of reduction of carbon dioxide and nitrogen oxide emissions. As a rail transport supplier, Alstom furnishes rolling stock, transport infrastructure and signaling, maintenance equipment, and global rail systems.