JAYANTA BASU The Nagpur-based organisation the state government is banking on to bring the Book Fair back to the Maidan was the one that had documented the environmental damage caused by the event. Chief secretary Amit Kiran Deb said on Tuesday that the National Environmental Engineering Research Institute (NEERI) would be asked to suggest measures to hold the fair on the greens next year. The same institute had found in a study during Book Fair 2006 that both suspended particulate matter (SPM) and respirable particulate matter (RPM) in the air around the Victoria Memorial were much higher than the permissible limits (see chart). SPM refers to overall dust while RPM comprises finer particles that enter the lungs and cause damage, at times irreparable, to the respiratory system. The study was carried out between January 29 and February 11, while the fair on the adjacent Maidan was held from January 25 to February 5. The NEERI report, published in 2007, had nailed the Book Fair and a children's fair for the alarming rise in air pollution around the Memorial.