Was it "cement," as NPR has been reporting, or "concrete" that failed at the bottom of the BP well, causing millions of gallons of oil to be released into the Gulf of Mexico? Some listeners have ...

Concrete is one of most durable manmade materials, but even this old industry workhorse has its weaknesses. Exposure to harsh weather, reactions with common elements, and poor construction can all ...

Katherine Martinko is an expert in sustainable living. She holds a degree in English Literature and History from the University of Toronto. There is the famous scene in Monty Python's "Life of Brian" ...