Write the next sentence in the following story.

How to protect pets from secondhand smoke
Quit smoking.
The easiest way to protect pets from secondhand smoke is to stop smoking yourself. If you smoke often, for instance in your home, and your pet is exposed to that smoke, then it can have very severe health consequences for both of you.
Instead, work on quitting smoking so that both you and your pet can have longer, healthier lives. Quitting smoking can be very difficult.