Buy Energy Star equipment. "If you're buying new office equipment, look for products with the Energy Star label. They're designed to save a lot more energy than products without the label," says Roberts. Keep in mind, that using less energy means your saving money, too.

Set your machinery to power-saving modes if you won't be using it for a time. Plug your computer and peripherals into power strips, like the SmartStrip by Bits Limited. Many devices continue to draw power when they're turned off, so power strips allow you to shut off the power on multiple machines easily. According to the Energy Star website, you can save up to $75 or more per computer by activating system standby or hibernate features and/or turning the power off on your office equipment. Energy Star also suggests hitting the power button on your monitor when its not in use: that small move can save you $10-$40, versus leaving a monitor running with a screensaver activated, which can burn up to twice as much energy.

Use compact fluorescents. When considering options to light your office, choose compact fluorescents over incandescent bulbs. "They use 75% less energy and last 8 to 10 years," says Roberts. Also, invest in a good task light on your desk so that you can kill the overhead lights when possible.

Buy sustainable or used furnishings. "My desk is a repurposed pine kitchen table. Reusing furniture that's been around the block a few times is a lot easier on the planet than buying new," says Roberts. Visit to view listings posted by people looking to promote reuse by exchanging various goods. If you can't find anything you like on the used market, go with a sustainable manufacturer like Knu Sustainable Contemporary Green Furniture. You can find more information on Knu and other sustainable furniture manufacturers at the Sustainable Furniture Council's website.

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