There is what might be called a Catch-22 of hazardous occupations: The more hazardous the job, the more men; the more men, the less we care about making the job safer. The Catch-22 of hazardous occupations creates a 'glass cellar' which few women wish to enter. Women are alienated not just out of the fear of being hurt on the job, but by an atmosphere that can make a hazardous job more hazardous than it needs to be.
p. 27. - Why Men Earn More (2005)