Have you ever felt dizzy or nauseous from a new paint job, furniture set—or new rug? It's probably a reaction to off-gassing—chemicals evaporating into the air. You can minimize this effect by choosing natural fiber rugs with natural backings to decrease your exposure to toxins. If you already have a synthetic rug, try leaving it outside in the sun for a week before bringing it indoors. And once you do, open the windows and turn on a ceiling fan to ventilate the room.