On the eve of the 25th anniversary of the “9/11” attacks in 2001, the New York City government first released air quality documents after the attack on the 8th showed that some lawmakers warned that there were harmful substances in the air around the World Trade Center ruins, while US EPA and New York City officials called the air “safe” at the time.

On the eve of the 25th anniversary of the “9/11” attacks in 2001, the New York City government first released air quality documents after the attack on the 8th showed that some lawmakers warned that there were harmful substances in the air around the World Trade Center ruins, while US EPA and New York City officials called the air “safe” at the time.