Ships today may get away with water pollution on a scale that would never be allowed on land. Some dump large quantities of human effluent into the sea after treatment that often comes down to little more than dilution. Container vessels suck up plant and animal life every time they take up ballast water, and then they release it on the other side of the world, introducing alien species that can devastate local ecologies. Thankfully, this is starting to change. With new regulations in both areas, it will be imperative that ship owners install type-approved water treatment systems to remain compliant.