Consumer concerns about poor working conditions in Asian factories and toxic chemicals used in fabric production are driving interest in ethical fashion, helping it start to appeal to a broader market…The collapse of an eight-storey garment factory in Bangladesh last April that killed more than 1,100 people drew global attention to the perilous conditions endured by many workers in Asia's garment industry, which supplies big Western retailers…The January 14-16 show, part of Berlin fashion week, features brands which use organic cotton, wool and bamboo or alternative materials such as recycled leather and plastic, and pledge to improve pay and conditions for farmers and garment workers.