Effect of asbest in the air in New York City, 911: negligible?

E quanto terão estes recebido ou que tachos prometidos para concluirem que é "insignificante" o aumento de cancros em consequência do amianto libertado no 11 de Setembro? Apenas quatro anos passados e já sabem isso tudo?
Diferente abordagem é a do National Cancer Institute:

"Those involved in the rescue, recovery, and cleanup at the site of the September 11, 2001, attacks on the World Trade Center (WTC) in New York City are another group at risk of developing an asbestos-related disease. Because asbestos was used in the construction of the North Tower of the WTC, when the building was attacked, hundreds of tons of asbestos were released into the atmosphere. Those at greatest risk include firefighters, police officers, paramedics, construction workers, and volunteers who worked in the rubble at Ground Zero. Others at risk include residents in close proximity to the WTC towers and those who attended schools nearby. These populations will need to be followed to determine the long-term health consequences of their exposure (11).

One study found that nearly 70 percent of WTC rescue and recovery workers suffered new or worsened respiratory symptoms while performing work at the WTC site. The study describes the results of the WTC Worker and Volunteer Medical Screening Program, which was established to identify and characterize possible WTC-related health effects in responders. The study found that about 28 percent of those tested had abnormal lung function tests, and 61 percent of those without previous health problems developed respiratory symptoms (12). However, it is important to note that these symptoms may be related to exposure to debris components other than asbestos.

Although it is clear that health risks from asbestos exposure increase with heavier exposure and longer exposure time, investigators have found asbestos-related diseases in individuals with only brief exposures. Generally, those who develop asbestos-related diseases show no signs of illness for a long time after their first exposure. It can take from 10 to 40 years or more for symptoms of an asbestos-related condition to appear* (2). "

*destaque meu