How to Use "radioactivity" with Example Sentences

1. The worst-case accident would be enormous releases of radioactivity .
2. Radioactivity in water has been a mounting concern in japan .
3. As a precaution , scientists are monitoring radioactivity in the air .
4. After detectors found a small amount of radioactivity , teams searched for 90 days .
5. But a shortage of research labs capable of conducting accurate radioactivity tests stalled the process .