abstract:In mechanics and aerodynamics, the drag area of an object represents the effective size of the object as it is "seen" by the fluid flow around it. The drag area is usually expressed as a product C_d A, where A is a representative area of the object, and C_d is the drag coefficient, which represents what shape it has and how streamlined it is.
"Not only do they signal a local economy in decline, they also become a hotspot for anti-social behaviour and drag down the whole feel of an area, " she said.