in addition to its geological threat, iran has poor earthquake engineering. in a 2004 report by sciencedaily, it was listed as "the worst offender" globally for poor earthquake engineering. professor roger bilham of the university of colorado at boulder, a geophysicist who specializes in earthquake-related deformation and hazards, blames construction practices for the fact that since the start of the 20th century, 1 in 3,000 iranians has died in an earthquake-related incident. bilham adds, "most of iran needs rebuilding. if the population of iran had a choice between spending oil revenues on munitions or houses that won't kill them, i suspect they would choose a safe home. it's all a matter of earthquake education." a common country assessment by the united nations for iran has similar results, stating that, "while adequate building regulations exist for large cities, it is generally believed that they are not rigorously adhered to... most of those who have suffered in recent major earthquakes have lived in small towns and villages. earthquake-proof construction is very rare in those areas and adequate building regulations are not yet in place".