Will carbon dioxide develop in my confined drawer?

So I have a REALLY long time since I last ventilated a big drawer I have under my bed. I have been keeping old toys I played with inside when I was 11-12. I am 19. So I opened it today and something stuck on the back of the drawer and I cant close it neither can I pull the drawer out. I am awaiting a technician but... show more So I have a REALLY long time since I last ventilated a big drawer I have under my bed. I have been keeping old toys I played with inside when I was 11-12. I am 19. So I opened it today and something stuck on the back of the drawer and I cant close it neither can I pull the drawer out. I am awaiting a technician but tell me is it harmful for the health? Like I said I dint open it much those last years so I am afraid perhaps carbon dioxide has developed in there?
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