Toads can live in drier climates, where most frogs usually live in or near water. In the Tropics, where most anuran (members of the order comprising the frogs, toads, and tree toads) species occur, however, the differences are harder to determine, and some species could qualify as either toads or frogs.
Radon Gas is Found in Homes all Over the U.S. Radon is an invisible and odorless radioactive gas. Elevated levels of radon have been found in homes all across the country. Any home in any state may have a radon problem: new and old homes, well-sealed and drafty homes, and homes with or without basements. Radon gas gets into all types of buildings, including office buildings and schools.
They are present in any environment where radon is found and, like radon, cannot be detected by human senses. The earth is the source of all radon gas in our atmosphere. Uranium is a natural part of the earth's crust. Therefore, radium and radon are also naturally present (as noted above).Since uranium and radium concentrations vary throughout the earth's crust, radon concentrations will also vary.s a noble gas, radon is colorless, odorless and chemically inert and cannot be detected by human senses. Also, since radon is not chemically reactive with most materials, it will move freely as a gas.