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Breakingviews 6 Min Read LONDON (Reuters Breakingviews) - Concrete is the most widely used human-made material on earth. It is essential to the bridges, roads, schools, homes and hospitals we rely on today, and will continue to be required in the future to support our modernising and urbanising planet. The construction site of a new windmill is seen on the Saint Gotthard mountain pass, Switzerland, September 3, 2020. REUTERS/Arnd Wiegmann Despite its importance, concrete also comes with a challenge that the world will need to address over coming decades. In 2019, the world produced 4.1 billion tonnes of cement, the glue that binds the ingredients of concrete together, according to the U.S. Geological Survey. That is enough to give half a tonne to every person alive. In making cement, carbon dioxide is also produced. The cement industry currently accounts for about 7% of global CO2 emissions, per the International Energy Agency.

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