Canadian-US environmentalist and anti-whaling campaigner Paul Watson is to remain in custody in Greenland for a further four weeks as legal wrangling over his deportation to Japan continues, a court sitting in Nuuk ruled on Wednesday. Watson, 73, is to remain in prison until October 2 to ensure that he does not leave Greenland until the deportation issue has been resolved, police in the autonomous Danish territory said. Watson has lodged an appeal with a higher court. One of the world’s best known anti-whaling activists, Watson’s confrontational methods have divided conservationists. Some see …