Many companies that position themselves as using sustainable materials obtain them from locations outside the U.S., ship them to another location to process, and then back to the U.S. for sale, contributing to carbon pollution in the process. A good example is wood from South America that’s shipped to Asia for production and then back to the U.S. for sale. So while this wood may be identified as “sustainable,” the process to turn it into products most definitely is not. Try to research the supply chain of your purchases—especially if they’re big ones, such as furniture—and buy locally made and sourced as much as possible.