Health Topics A-Z

Air pollution is a mix of substances from human-made and natural sources that can affect human health. Outdoor and indoor air can be polluted.

Arsenic is a naturally occurring, semi-metallic element found in water, air, food, and soil. When taken into the body, it can cause serious harm to human health.

Flame retardants are chemicals applied to materials to prevent ignition or slow the spread of fire. While they may offer some safety benefits, research shows that many of these chemicals may harm human health and the environment.

Lead is a naturally occurring metal that has been used in many products and industries. If taken into the body, it is hazardous to health.

Migraine is a condition that is more than just a bad headache. Symptoms of migraine differ from person to person but often include recurring headaches, nausea, vomiting, mood changes, extreme tiredness, and sensitivity to light, noise, and smells.

Per- and polyfluoroalkyl substances (PFAS) are a large group of synthetic chemicals. Found in many everyday products, they are linked to a range of health concerns.

Pesticides are substances used to kill, repel, or control certain forms of plant or animal life considered to be pests. They may pose risks for a variety of health problems.

Radon is a radioactive gas you cannot see, smell, or taste. It comes from the ground and can build up inside homes and buildings, raising the risk of lung cancer and other health conditions.

Weather extremes, including severe heat and cold, wildfires, storms, hurricanes, droughts, and floods can have adverse effects on human health.