By Susanne Filzwieser - Daniel Fruhwirt from TU Graz explains what causes bad air quality in tunnels, how fresh air gets into tunnel systems and how "smoke management" enables safe escape routes in the case of fire. Ensuring that the air in tunnels is breathable and that escape routes remain smoke-free in the event of a fire is the central research objective of Daniel Fruhwirt. Image source: Lunghammer - TU Graz. News+Stories: Let's get something out of the way: can I take a deep breath in a tunnel with a clear conscience?. Daniel Fruhwirt: Yes, the air quality in a tunnel meets the requirements for deep breathing. Nevertheless, a tunnel is of course not a health resort. As with almost all pollutants, the dose makes the poison.
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