It may come as a surprise, but of everything that we wear, sneakers have one of the biggest environmental footprints. The manufacturing process is energy-intensive, and many of the components are made from virgin plastic, which never break down. Not only that, but we are wearing out our sneakers at a faster rate than many of the other items we have stashed in our wardrobes, with the number of sneakers that have ended up in landfill somewhere in the billions. And one of the things I’ve been making more of an effort to do this year is shop sustainable first.…