Permeable paving refers to a type of pavement that allows water to pass through its surface and permeate down into the ground. There are several synonyms for this term, including porous pavement, permeable pavement, and water-permeable paving. These terms are often used interchangeably to describe a range of paving materials, including porous asphalt, permeable concrete, and interlocking pavers with spaces that allow water to seep through. Permeable paving is an important innovation in sustainable design, as it helps to reduce stormwater runoff and prevent flooding, while also reducing the heat island effect in urban areas.