British actor Jude Law has written a letter to the World Trade Organization (WTO) calling for a European Union (E.U.) ban on seal fur imports to be upheld following a challenge from the Canadian government. The Sherlock Holmes star has backed a campaign by People for the Ethical Treatment of Animals (PETA), which opposes Canada's efforts to repeal the ban and revive the seal fur trade. In his letter to WTO officials, Law writes, "The purpose of the WTO is to support efficient markets, not government decisions to prop up dying industries like the seal slaughter. Rather than using the WTO to prop up a dying industry, Canada should pursue a buyout of the commercial sealing industry - a move that would help both seals and sealers. The world is watching and waiting - please uphold the E.U. ban." A crucial WTO hearing on the matter is to be held on 29 April (13) in Geneva, Switzerland. Actress and animal rights activist Pamela Anderson has also written to the WTO asking for the ban to be upheld.