POLLUTION PROBLEM Vietnamese villagers protest Hanoi Vietnamese police arrested six villagers over a protest against pollution from a coal-fired power plant in April, police said on June 11.The protest caused a 20 kilometre traffic jam. On April 14 and 15, thousands of vil lagers blocked a highway in the Tuy Phong district of Binh Thuan for 30 hours. Coal residue from the plant was dumped into a 15.3-hectare landfill without being covered and blew into the villagers' homes. Repeated com plaints were ignored, villagers said. DPA