The by-products that are formed when radon decays, are what damages the lungs. The federal government recommends that you measure the level of radon in your home. Without testing, there is no way to tell whether radon is present because it is an odorless gas. Luckily, inexpensive kits are available to test for radon. Every state in the country has areas with radon problems.
Some states are more prone to problems than others.
Anywhere that has high levels of uranium, be on the lookout for potential radon problems. What's interesting is that very few people pay attention to the risk of radon since it is naturally occurring. While a man-made source of radiation would attract a lot more attention, more people are probably exposed to radiation risk from radon. The risk to radon exposure can be high. Few people voice concern because there is no one to blame or to sue.