Was the air cleaner before than now?

Since 2020 - after Antwerp and Brussels - Ghent also has a low-emission zone: old, polluting cars are banned from the city. The goal: clean and healthy air for city dwellers. But what exactly is clean air? Does a low-emission zone help? What substances do and don't belong in the air we breathe every day? How unhealthy is it all? Is our air quality worse than it used to be? Or is it all not so bad? Professor Tim Nawrot is an environmental epidemiologist and has conducted a great deal of research into the impact of air pollution on our health. He is the perfect man to tell us whether there is still clean air anywhere.

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