See: http://www.oregon.gov/ODA/Pages/news..._measures.aspx "It appears the tree species’ natural toxicity to bumblebees in combination with the pesticide contributed to the deaths."
Stand for what you believe, even if you stand alone.
if you google you'll find lots of links on this. A number of lime / linden are toxic to bumbles but not honeybees. Some are toxic to both. Some produce good honey.