Mental Health affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make healthy choices. Mental health is important at every stage of life, from childhood through adulthood. Environmental exposures to toxic substances can lead to disease, illnesses, disabilities, and other medical conditions. The connections to psychiatric conditions are not as well known. However, there is a substantial amount of scientific evidence that certain exposures can lead to both temporary and long-term psychiatric symptoms and illness.