Hi all
Studies of diesel fumes have been made for a few decades now and it's known that they cause health problems. That's why mining companies that have diesel machines operating underground spend quite a bit of money ensuring the emissions are as low as possible. I actually came across a medical study of diesel emissions a few months ago, it's buried somewhere in my files. As we understand more and more we will l find that some things are more dangerous than we assumed or know at a prior time and some things will be found to be less dangerous. people should be thankful that there is ongoing medical research looking at the statistical incidence of health issues of diesel. Miners and other workers and employers can then take appropriate actions to alleviate the risks. We can't eliminate them but by knowing what levels have what risks we can mitigate the statistical impacts.
Mike