In a world-first, the extent of human development in oceans has been mapped. An area totalling approximately 30,000 square kilometres—the equivalent of 0.008 percent of the ocean—has been modified by human construction.
The extent of oceanmodified by human construction is, proportion-wise, comparable to the extent of urbanised land, and greater than the global area of some natural marine habitats, such as mangrove forests and seagrass beds.
Source: Phys.org News