On the adoption issue, I'm a bit umming and arring on that one....undecided in other words. I wouldn't be bothered if a shelter refused to adopt to a smoking home and neither would I be if they did adopt out to a smoking home.

I was mainly pointing out that smoke is a risk for pets because it seemed that some people were stating that they didn't think it was.

If I was adopting out personally, I know I'd prefer pets to go to non smoking homes than smoking ones...providing either was suitable for the pet anyway but I don't know whether I'd block pets going to smoking homes providing they would give the creature proper care...fortunately, I don't have that job.
I think more shelters might develop issues with smoking homes with more evidence that comes to light about the risk it causes pets but I also think it would do wonders for the actual smokers if they tried to kick the habit also....maybe the creatures could be an incentive...they are good for humans in other ways, why not that?

Still, saying that, even if people smoke, it doesn't mean they smoke indoors, they might prefer to smoke outdoors to prevent smells or discolouration of walls etc...protect any children living in the house or out of respect for another adult/partner who lives with them and doesn't like smoke...in this case I doubt a pet would be at risk.....it's just hard to know what habits each smoking applicant has regarding their smoking and I don't think shelters want to start asking about a persons smoking habits and, even if they did, no doubt some people might fib about them in order to stand a chance.

I've always been anti-smoking from being a young child but I think it was the deaths of those two dogs that really made me think about pets living in smoking homes. When you personally know creatures that died because of it, it does have an affect on your opinion about it.

Oh, just saw Freedoms post.
In the UK, it gets even better, lol. They are banning smoking in all public buildings, places of work, pubs, clubs, even partially enclosed areas or areas where people have to congregate like bus stops and doorways to work places where smokers would use as a smoke area.
If you live in a council property, you cannot smoke in your house whilst there is a council worker in your home. I'm not sure if this extends to private hire workers etc...
Also, if you are in a car that is being used to give other people lifts, say co-workers who all get in the same car to save on petrol etc...you cannot smoke in those either...even if it is your own car.

This comes into force in July in England. Southern Ireland already has the ban in place.