What an interesting article! (Energize Jan/Feb 2013 page 18.) However, I soon found the $1-million question. It is very questionable whether the zero-linear thresholds hypothesis has any validity at all. What it says is that, however low the dose, it will have a negative effect. So, for instance, Riekert and Koch note that nickel as a pollutant is associated with about 20k to 30k cancer cases per person- year microgram/m3… (more)