Would woodshop dust make COPD symptoms worse?

While it is good that your husband has a hobby that he likes, I do agree with your concerns about the dust/debris possibly creating problems for his chronic lung disease. However, I don't think he needs to stop his woodworking, but I do think a mask would be a good idea to protect himself, especially when he is using power tools and creating dust. He should also be working in a well ventilated area, and do as much of the work that creates the dust outside, so he does not irritate his lungs.

Perhaps you can convince your husband to wear a mask when he is working with the tools and creating dust. If he complains that he cannot breathe when he is wearing the mask, then maybe his pulmonary doctor could help convince him. Good luck!