How can I kill tree roots in our sewer line? I don't want to use the copper sulfate products or foaming dichlobenil products the hardware store sells. I understand copper is hard for the water treatment plant to remove, and the diclob is a possible carcinogen.
Someone told me just cutting the roots with Roto Rooter makes them grow back faster.
Somewhere I read that table salt or rock salt might work. This is a recurring problem for us.