As part of its recycling campaign, Walmart is beginning this month to sell eco-friendly pet products such as dog beds and kitty litter boxes made from trash. Another new Walmart effort begun this month is a collection system for 28 types of trash that’s being tried at five stores on the East Coast. TerraCycle, takes the waste, including candy wrappers, pens and coffee bags, and upcycles the waste into products like tote bags and portable speakers.