What is radon?
2020-01-28T11:13:05.675Z
Radon is an invisible and odorless gas found in soil air and water. See how the radon can harm the person in the video clip.
Source: svt
Catch up locals' news in English
2020-01-28T11:13:05.675Z
Radon is an invisible and odorless gas found in soil air and water. See how the radon can harm the person in the video clip.
Source: svt