Sarah thought she was losing her mind. Despite being only 34 years old, she could barely make it through the afternoon without feeling completely drained. Her 8-year-old daughter Emma had developed a persistent cough that doctors couldn't explain, and her partner complained of constant headaches tha...

Picture this: You arrive home after a long day, looking forward to the cool, refreshing air from your air conditioner. Or you start your car on a sweltering summer morning, grateful for the blast of cold air that greets you. These everyday moments of comfort might actually be exposing you and you...