Spores of disease-causing bacteria can be killed by the method of _____

UV radiation :

1. UV radiation is a form of non-ionizing radiation emitted by the sun as well as other man-made sources such as tanning beds.
2. Sunburn and suntan are typical adverse effects of UV radiation exposure, as also an elevated risk of skin cancer.
3. The Earth would be unable to maintain life on the dry ground due to the amount of UV radiation emitted by the sun if the atmosphere did not filter away the bulk of that light.

Final answer: Spores of disease-causing bacteria can be killed by the method of UV radiation.