In the United States, researchers from the Smithsonian Environmental Research Center in Maryland found that the ballast water carried by ocean - going vessels contains high numbers of bacteria and viruses.
Amerikas Savienotajās Valstīs Smitsona vides izpētes centra (Mērilenda) zinātnieki atklāja, ka okeāna kuģu balasta ūdens satur daudz baktēriju un vīrusu.