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This material, concrete, is the world’s second-most used, behind X, and the most-used in the construction industry. X is also used in concrete. Name X.
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An important ingredient of concrete is X. The most common type of X in the world is Portland X, named for its similarity to a stone mined in the Isle of Portland, England. What is X?
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The bacterium Sporosarcina pasteurii takes calcium and urea to produce calcite, a form of _____ ______. Adding S. pasteurii to concrete increases its compression strength. Fill in the blanks.
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Most of concrete’s enormous carbon footprint is due to the production of _______, the main compound of cement. It’s made by fusing limestone and clay. Fill in the blank.
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Concrete and X are the major culprits of the urban heat island effect, in which urban areas are warmer than rural areas, especially at night. Name X, which is called asphalt in the U.S.
