Reducing the amount of power your computer uses conserves resources and lowers CO2 (carbon dioxide) emissions. Here are some guidelines that can help you cut back on the energy your home computer consumes:

Assess the power your computer uses. Get a smart power meter or plogg.
Turn it off when you’re away for 2 hours or more. Use smart power strips.
Reduce the number of peripherals you use. Upgrade the memory in your system.
Unplug unused peripherals. When you buy a new system, buy green.
Use power management features.