The Greens are making the most of their spell of influence, as they hold the balance of power between Labour and the Liberal Democrats on the city council.
One of their better ideas, adopted at the council budget meeting, was to have a realtime display outside the Town Hall, showing the air quality across the city.
Shoppers and workers will know at a glance what they are breathing in.
With more awareness these days of pollution and the risks to health, it is important that this information is available to the public.
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