Installing a solar array or getting your own wind-turbine can be an expensive investment for some. Sure, it pays itself back over the next few years, but the lump sum can be a hefty investment. Just because you can't afford to go off the grid right this second, it doesn't mean you can't do your part to help the environment. By tweaking your everyday habits, you reduce your carbon footprint and spread the worldwide message of sustainability. These 5 simple habits will cost you nothing and maybe even save you money!