A Supreme Court mandated panel today declared a public health emergency in the Delhi-NCR region and banned all the construction activity till 5th November.<br />''<br />''In a letter written to Chief Secretaries of Uttar Pradesh, Haryana and Delhi, EPCA chairperson Bhure Lal said air quality in Delhi-NCR in a severe category. He said, this situation must be taken as public health emergency as air pollution will have adverse health impact on all, particularly our children. <br />''<br />''<br />