system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does radiation poisoning kill you?

for example how does drinking contaminated water or being exposed to contaminated air actually kill you?
gpt
Ionizing radiation, the dangerous kind of radiation, can damage your body's cells all the way down to the DNA, which is what controls the whole cell.

It's like replacing your kindergarten teacher with another 5-year old. No one would do anything they were supposed to and chaos would ensue. Eventually the principal would come and get you all in trouble.