The following article has some really interesting opinions from a man who has been involved in Solid Waste for many, many years. He is one of my mentors and I have two of his books as references. One is a large notebook on Landfill/Solid Waste Safety protocols - only 2.5 inches thick by the way and has many "It really happened" stories proving safety needs and issues. The other is The Handbook on Landfill Operations. Both are easy to read and understand but are very, very detailed.
The article is very interesting and thought provoking.