Hi spike3029,
This is an excellent topic for a science project if you live in an area where radon contamination is a problem. Radon is a radioactive noble gas that is formed from the decomposition of radium in the earth. Since it is a gas, it floats up out of rocks and into homes; since it is radioactive, long-term exposure is definitely a health hazard.
I recommend starting with the official EPA website on radon, which provides information on health risks, radon test kits, and recommendations for building radon-resistant houses. This should give you the background information needed to identify your project idea.
https://www.epa.gov/radon
Next, you will want to do additional background reading, and hopefully find some scientific papers on this subject. Then you will be able to write your project question. Here is the basic guide for doing a science project from this website:
https://www.sciencebuddies.org/science- ... ndex.shtml
Please do post again if you have any questions.
Donna Hardy