When it comes to paper coffee filters, you’ll often see two choices at the supermarket: There are white filters and unbleached ones, which are a tan color. What’s the difference? It all comes down to how the paper is treated. White filters are often bleached using chlorine, which is the least environmentally sensitive choice. Unbleached is pretty much just that: It’s untreated paper. But coffee experts agree that when it comes to taste, either choice can give you the same cup of joe. So to give your morning cup an eco-boost, choose unbleached.