(File)

NEW YORK (June 20 2012)--Some scientists dispute a decision to link 50 kinds of cancer to exposure to World Trade Center dust, saying there's little research to prove that exposure to the toxic dust on Sept. 11, 2001 caused even one kind of cancer.

The head of the National Institute for Occupational Safety and Health added scores of common and rare cancers to a list this month in a move that could help hundreds of people get payments from a multibillion-dollar World Trade Center health fund to repay those sickened after the 9/11 terrorist attacks.

Some experts say there is little research to prove that breathing the toxic dust gave people cancer.

Others say the contaminants may well have triggered or accelerated some types of cancers, and that the government made a choice that serves a large human need.