Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Click on different parts of the image below, or on one of the links below the image, to explore houses, schools, hospitals and sources of non-ionizing radiation that you may encounter in your everyday life.
