True or False: The majority of radon exposure in humans comes from inhalation rather than ingestion.

The statement is true. The majority of radon exposure in humans indeed comes from inhalation rather than ingestion. This is primarily because radon is a radioactive gas that can accumulate in indoor environments, especially in basements and other areas of a building that are in contact with the ground. When radon gas is present, people inhale it along with the air in their living spaces.

Inhaling radon and its decay products can lead to significant health risks, as they decouple and emit radiation, potentially causing cellular damage and increasing the risk of lung cancer over time. Studies have shown that radon-related lung cancer risk is a major public health concern, particularly in regions where radon levels are high.

While ingestion can expose individuals to radon through contaminated water sources, the exposure levels from inhalation typically far exceed those from ingestion, making inhalation the primary route of entry for most individuals exposed to radon in their homes. This understanding is vital for public health messaging and radon mitigation strategies, emphasizing the importance of monitoring indoor air quality for radon levels.