Melbourne's Southern Cross Station is a gateway for commuters and visitors to the city, but experts say secret data shows the air quality poses a health risk to workers and passengers.

Melbourne's Southern Cross Station is a gateway for commuters and visitors to the city, but experts say secret data shows the air quality poses a health risk to workers and passengers.

But the transport worker at Melbourne's Southern Cross Station is worried about how the train and bus hub is managing air pollution. In a series of stories this year, the ABC revealed high levels ...