It is Asbestos waste and yes they are dangerous if you get close and step in it all day. But at this distance it's ok, This is a "recent" mountain because the old ones are covered with plants and trees.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.