Ah, those things we put our feet (or wheels) on. Floors do a whole lot for us without asking for much in return, and if you're thinking about replacing or upgrading yours, have you considered the environmental implications of what you choose? Flooring makes up a significant portion of your home and it's a building material that's often replaced, thanks to the fact that floors wear down quickly, what with all the walking, wheeling, furniture moving, and goofing around. Your choice of flooring isn't just an aesthetic decision, it's also an environmental one.
So, mirror mirror on the wall, what's the greenest floor of all?
The greenest choice, bar none, no matter which other factors are going on, is the floor you have. By keeping your floor, you eliminate the need for more flooring materials along with associated costs. If your floor isn't in great shape, you may be able to refurbish it with buffing, waxing, replacement of damaged components, and other options to get it looking like new again.
If this isn't an option for you (your floor is falling apart, it's totally hideous, etc.), floors made from reused, recycled, and refurbished materials are often a next best bet. These materials eliminate the need for brand new source materials (like wood) and also keep things out of the waste stream, in a pretty cool double-whammy.
Bamboo is a fast-growing grass that's become popular for flooring in recent years because of its highly renewable nature. It can be softer than hardwoods, so it's better suited for areas where foot traffic isn't extremely high (bamboo halls, for example, aren't a good idea). Cork flooring is another fantastic option. Sustainably harvested cork is taken without damaging the parent tree, and it's incredibly durable in addition to beautiful. Might seem weird to walk on wine corks, but give it a shot!
For carpet-lovers, wool carpeting is a green option. It's durable, beautiful, and naturally fire-resistant (nice bonus!). Steer clear of wool that's been processed with harsh chemicals and dyes; lots of firms make sustainable wool carpeting that's quite lovely. Another option is sustainable hardwood, harvested under supervision from third party certifying organizations.
Speaking of tile, ceramic and glass tile are ancient flooring materials and they're good choices as well. These materials hold up well and they can be made from recycled components (in addition to being recycled when they're no longer needed). Ask for samples of eco-friendly materials to get an idea of the styles and colors available.
Whichever flooring option you choose, don't forget to ask a critical question: what happens to the old flooring? Make sure your contractor is taking it to a recycling, refurbishing, or reclamation facility, not dumping it in a landfill.