Geologist Determines How Ancient Roman Concrete Still Stands

Concrete is a building material made of water, gravel, sand, limestone, shells, chalk, clay and iron ore. It’s used ubiquitously in construction from building foundations to sidewalks, roads and bridges. Its lifespan tends to be only about 50 years, and its manufacture is associated with significant negative environmental impacts — including emissions of air pollutants … Continue reading Geologist Determines How Ancient Roman Concrete Still Stands