Green computing refers to the responsible use of computer and related resources with the object of curbing the negative effects that the increasing use of computers and their associated technologies have on the Earth's limited natural resources. Green computing is part of the broader concept of green technology (Green Tech), or clean technology (Clean Tech), which aims to use environmental and materials science to ensure that current and future technologies are socially equitable, economically viable, and do not damage or exhaust natural resources (sustainable).

Green computing has been evolving over the last decade and, although there is no universal agreement as to what it may finally encompass, it generally considers all aspects of computer technology that contribute to reducing global warming and electronic waste (e-waste) through the use of alternative energy sources, power management, recycling, and biodegradable materials. Green computing also includes the implementation of national or international policies, agreements, and regulations to accomplish the above goals.