I am far from an expert, but here in germany glas gets recycled in 3 bins, brown, green, white - and get usually smashed by people throwing those bottles in.
So not much air.
And cleaned they still can get (and should)
Germany is quite ahead of the curve when it comes to recycling.
Here in Boulder, CO, USA, recycling goes only into one bin. It then needs to get sorted at the recycling center. We're told not to smash bottles. Glass has to first be sorted by color.
Also we have nothing at all like the Pfand system. I pay for the privilege to have recycling taken away, not the other way around. What Germany has is awesome.
I am far from an expert, but here in germany glas gets recycled in 3 bins, brown, green, white - and get usually smashed by people throwing those bottles in. So not much air. And cleaned they still can get (and should)