Green computing involves the environmentally responsible use of computers and resources throughout their lifecycle. It aims to reduce the environmental impact of computing devices through more efficient design, manufacturing, and disposal practices. The concept originated in 1992 with the EPA's Energy Star program. Green computing is important because conventional computing uses large amounts of electricity and can produce toxic waste, harming the environment. Key methods for green computing include using solar and carbon-free technologies, turning devices off when not in use, and industry initiatives to promote conservation and sustainability standards. The benefits of green computing are improved energy savings and a more eco-friendly approach.