If you don’t stop smoking for your health, do it for your pet's. Studies indicate that secondhand smoke can raise your pet’s risk of certain kinds of cancer and respiratory problems. So the next time your cat is going through her grooming motions, think about all the carcinogens she’s licking up. If you’re a dog owner, your dog is breathing in those carcinogens, putting him at risk of nasal or lung cancer.

In a recent online survey, 28 percent of pet owners who smoke said they would consider quitting after learning that their secondhand smoke could harm their pets.

NEXT: Put your money where your mouth is >>