Leading international scientists have published a joint call for societies to introduce and enforce use zoning of Earth's coastal ocean waters, mirroring approaches commonly used to manage and protect land resources. The 24 scientists, from Canada, the USA, the UK, China, Australia, New Caledonia, Sweden and Kenya, underline that 20 percent of humanity -- mostly in developing countries -- lives within 100 km of a tropical coast and urge new management measures as population and climate impacts on coastal waters worsen....