Asbestos roofs widely used on the houses of the tea garden workers in greater Sylhet region pose high risks of cancer, said health experts and environmentalists...the tea workers in Sylhet region have been using asbestos for long as it was distributed by the tea garden owners. Deaths of quite a few tea garden workers in cancer raised concerns over the use of asbestos recently...Harun-ur-Rashid, former director of Project Development Unit of Bangladesh Tea Board, said the government-owned tea gardens already stopped the use of asbestos. However, there are still some houses with asbestos roofing in private tea gardens.