The specific activity should meet the requirements that the internal irradiation index is not greater than 1 and the external irradiation index is not greater than 1.3. Excessive radioactive elements will affect health, but many decoration markets do not meet the national standards. I suggest that you can do interior decoration if you want. My father has been working for 40 years, and his body is still very healthy ... but pay attention to paint and dust and wear a mask. In fact, every industry has occupational diseases.