Question 42

Listen to the recording: Concrete is prone to cracking, which typically requires costly manual repairs to prevent further damage. To address this, scientists have developed a new form of bio-concrete embedded with special bacteria. When water seeps into a crack, the bacteria activate and produce limestone, sealing the gap naturally. This self-healing capability transforms the material from a static element into a responsive system. By effectively managing its own defects, the concrete can significantly extend its ...