Rogers experienced a 12 - day increase in ragweed pollen season between 1995 and 2011. (treehugger.com)
Higher ragweed pollen concentrations and a longer ragweed pollen season may also increase the severity of ragweed symptoms, with populations across most of Europe likely to be affected in the next 35 years. (sciencedaily.com)
Rogers experienced a 12 - day increase in ragweed pollen season. (ofa.us)