If you use disposable coffee filters to make your morning cup of joe, look for two things in the supermarket aisle to help you make the greenest choice. First, choose natural, undyed brown filters over bleached white ones; the white filters make no difference in quality of the coffee and are whitened using chlorine bleach or other chemical whitening methods. Second, instead of paper coffee filters, which come from trees, look for filters that use bamboo fiber. It has the feel, look and same effect as paper, but it comes from a fast-growing renewable resource that does not have any deforesting effect. But the greenest choice is a reusable filter. Consider investing in one to save money and time and to reduce waste.