The Forestry Forum

Hi everyone!
I'm an spanish student and I am writing a report about the Forestry sector in the world. Currently, I am working for a forestry firm which is interested in exporting his services, especially fire prevention and fire extinguishing services, because they are specialized in fire causes investigation (like Crime, Scene and Investigation :D)
I wonder if somebody could tell me which is the most important Trade Fair (connected with Environmental and Forestry) in the world, because I am very interested in knowing something about it.
Thanks in advance.
Greetings from Valladolid, Spain.