We think of our homes as sanctuaries—places to relax, recharge, and shut out the world. But every day, without a sound or a warning, we let in invisible intruders. They drift through the air we breathe, hide in the products we use, seep from the furniture we sit on, and settle in the dust on our shelves. These intruders are toxins—harmful substances that can quietly affect our health and the environment.
