Toxic chemicals in cars — VOCs that include bromine, chlorine, and lead — off-gas from the seats, dashboard, steering wheel, and other components. Since we Americans spend on average more than 1-1/2 hours in a car each day, this amounts to a lot of exposure to indoor air pollution.
What can you do about it? Leave your car windows open whenever possible. Use the fresh air intake instead of recirculating the same air. Park in the shade to avoid the high temperatures that increase VOCs.