<prompt> The MINIMUM recommended space for each factory worker is:200 cubic feet250 cubic feet500 cubic feet700 cubic feet  <response>: The WHO ILO committee on Occupational health in 1953 recommends a minimum of 500 cubic feet per worker. Sufficient space is needed to prevent not only respiratory diseases but also to ensure a comfoable working environment. Ref: Park 21st edition page: 753. 