US police radios killing trees / The Register, 20 August 2008
http://www.theregister.co.uk/2008/08/20/police_radios_killing_trees/
"The relaxed attitude to spectrum use in the USA has come under pressure as a new police radio system in Dallas is interfering with an automated sprinkler system 30 miles away, resulting in brown lawns and dead trees in Plano."