Final answer:
Green computing is the reduction of electricity consumption and environmental waste when using a computer, aiming for sustainability and reduced environmental impact.
Step-by-step explanation:
The reduction of electricity consumed and the environmental waste generated when using a computer is referred to as b) Green computing. This concept encompasses efforts to reduce the negative impacts on the environment through sustainable practices in the use and design of technology. Green computing involves measures such as using energy-efficient components, promoting recycling of e-waste, and implementing policies for eco-friendly disposal and longer product life cycles. By adopting green computing practices, we move towards sustainability, which is essential for environmental conservation and reduced ecological footprints.