We've been using the same bricks for over 5,000 years. This engineer says it's time for a change.

Although we're surrounded by millions of them every day, most of us don't think about bricks too often. For thousands of years, the humble clay-fired brick hasn't changed. The building blocks of modern suburban homes would be familiar to the city planners of ancient Babylon, the bricklayers of the Great Wall of China, or the builders of Moscow's Saint Basil's Cathedral.

But the brick as we know it causes significant environmental problems, by using up raw, finite materials and creating carbon emissions. That's why Gabriela Medero, a professor of Geotechnical and Geoenvironmental Engineering at Scotland's Heriot-Watt University, decided to reinvent it.

Read more at CNN Style.

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