An architect figured out how to build houses from plastic waste

This one innovation could help resolve two of the world's biggest issues: homelessness and pollution. Oscar Andres Mendez and his team at Conceptos Plásticos have created a way to take discarded plastic and rubber and create stackable bricks with them. These bricks snap together to create quick and easy housing. Conceptos Plásticos won Unilever's Young Entrepreneurs Award.

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