But I notice that this MSNBC report carefully avoids stating any numbers -- which leads me to believe that the actual risk factor may be pretty small.
Fun with numbers, apparently.
A touchey problem is that the political left are city dwellers who invest heavily in diesel buses which obviously operate in close contact with people. This has class action lawsuit potential that could bankrupt the liberal establishment. They do have most laywers and judges to protect them though.
Could you explain how it is that you can see how this is possible? I cannot see how diesel exhaust, which is made up of heavy particulate matter that falls to the ground rather than entering the air that people breathe, can cause harm to people.