Another example from overseas, Rothy's, a brand established by Roth Martin from San Francisco, has recycled, sterilized, heated and milled nearly 77 million plastic bottles collected from landfills and transformed them into shoes. The business also covers ocean plastics. Till now, it has transformed over 200,000 pounds of ocean plastics into bags that are machine washable.

Also, it turns harmful algae collected from waterways into foam and shape it into strobel boards, making shoes sturdier and keeping the marine ecosystems well-balanced. The signature outsoles of Rothy's involve zero carbon but 35 percent natural and renewable materials, while insoles contain 30 percent plant-based oil and recycled rubber.