There wasn't any, even though they finished on a statement something like "After the overwhelming evidence presented here..." *eyeroll*

Not to belittle the people or their claims, but it means very little without some actual evidence. In the viewer questions that the lady answered on the 60 Minutes webpage, she openly says she has no idea what chemicals the macadamia farmers are actually using, so that probably accounts for quite a bit of the lack of scientific evidence when that is the basis of the story. It's a pity when it'd be great to have balanced reporting on the kinds of issues. :(