In 2004, the Environmental Protection Agency launched a program called SmartWay to work with freight supply chain operators (think freight trucks) to find ways to maximize their fuel efficiency and lower emissions. Recently, SmartWay has expanded into the rental car market to encourage companies to rent out cars that are the most fuel-efficient in their category. When renting a car, look for SmartWay-certified ones to help you save fuel and money with your rental. A general rule of thumb is this: Most vehicles in economy, compact and intermediate classes are SmartWay certified. But when in doubt, ask.

When shopping for a new computer, think laptop instead of desktop for the greatest energy savings. A laptop is about one-third more energy efficient than a desktop. And if you want to get an even bigger energy savings, look for laptops that feature LED screens, which are more efficient and are also mercury-free. And remember, when you need to dispose of your old computers, take them to retailers like Best Buy and Staples, which will recycle them free of charge.

If you have a place at your home that provides food, water, shelter and safety for wildlife, the National Wildlife Federation wants to name you a Certified Wildlife Habitat. Over 400,000 gardeners across America have been certified by the NWF, and it's all part of a campaign to get 1 million gardeners to be part of the Million Pollinator Garden Challenge to help restore critical habitat for pollinators (like bees) in peril. Learn more at nwf.org.