Premature ventricular contraction (PVC) is a type of abnormal heartbeat, or arrhythmia. It happens when the heartbeat begins in the lower, rather than the upper, heart chambers. This creates an ...

Installing a new roof on a commercial building is a major investment that affects operating costs, energy efficiency, and long-term asset value. Among modern roofing options, PVC flat roofing systems ...

Plastic is one of the world’s most ubiquitous materials, essential to daily life as we know it. Production is growing at a rate of 3.4 percent—three times faster than our global population growth.