Cedar Rapids Gazette: New University of Iowa research out this week associates higher exposure to commonly used insecticides — including those in use across Iowa — with an increased risk of death from all causes, specifically cardiovascular disease — even as the market share of that potentially deadly pesticide grows. That swell in use, according to UI assistant professor of epidemiology and study author Wei Bao, means the rate of deaths related to the chemical exposure likely has increased as well — although he urged more investigation.