(b)that danger to the health of the inhabitants of buildings in any area, or to buildings in the neighbourhood of such area, is likely to be caused by-(i)the narrowness, closeness, or bad arrangement or condition of streets or buildings or groups of buildings in such area, or(ii)the want of light, air, ventilation or proper conveniences in such area, or(iii)any other sanitary defects in such area, the Board may frame a general improvement scheme in respect of such area.
