Tunnelling has and is causing great damage to the workers through compromised air quality. The government evidently wants to keep the impacts of this hidden. Would it not be reasonable, and sensible, to get this out in the open now? Tunnelling has and is causing great damage to the workers through compromised air quality. The government evidently wants to keep the impacts of this hidden. Would it not be reasonable, and sensible, to get this out in the open now? National / NSW Sydney Morning Herald – Latest News