Of the three Rs in the classic green mantra “reduce, re-use, recycle,” it’s the last that is most widely embraced, according to an article on Fastcompany.com. But despite its popularity, recycling is the least energy efficient alternative of the three. Damon Carson is more interested in the middle one. As founder of repurposedMATERIALS in Denver, Colorado, Carson has spent the last four years keeping millions of pounds of material out of the waste stream by finding creative re-uses for discarded industrial products.