Final answer:
Radon is a colorless, odorless, and tasteless gas that is released from the ground. It is linked to an increased risk of lung cancer and can be reduced with ventilation systems.
Step-by-step explanation:
Radon is a colorless, odorless, and tasteless gas that is released from the ground, particularly from rocks and soils high in uranium content. It is a noble gas, meaning it is not chemically reactive. Increased exposure to radon has been linked to an increased risk of lung cancer. Modern construction techniques, such as ventilation systems, can help reduce radon levels in buildings. However, weather conditions can affect radon levels, causing them to vary.