**1. Introduction**

Green computing was started in 1992 and was named Energy Star. In the last decade, computing devices have become a large part of our daily life. Every person has more than one cellular and computing device. There are on our planet milliards of computing networks and devices that consume a huge amount of electrical energy. By designing and manufacturing energy-efficient computing devices, servers, and laptops, we can minimize air and water pollution. One of the main goals of electrical and computer engineers should be to evaluate and manufacture green computing devices, servers, laptops, and tablets. Moreover, disposing and recycling unwanted computing instruments and electronic devices is important in creating a green planet. Every person can contribute to green computing by environmentally responsible use of computing devices and cellular phones.
