Imagine what the world would be like without concrete: there'd be no high-rises, no grand irrigation projects, no lettuce from southern climes in the winter, no multi-lane highways crisscrossing continents, a shortage of electricity, more mud in some places, more solitude in others. But because of the fossil fuels and other resources required to make concrete, there also would be less CO2 in the atmosphere and less dramatic climate change. In Concrete: From Ancient Origins to a Problematic Future, Soderstrom tells the story of concrete's glorious past, extravagant present, and uncertain future with careful research, lively anecdotes, and thoughtful reflection. The framework for this exploration is one the Romans—famous for concrete structures that are still strong—would understand: the four elements of Earth, Fire, Water, and Air.