Yes there are lots of different types of radiation and humans give off some of these types. This will be different than the radiation you think of when you think about nuclear things!
Yes we do, there a lots of types of radiation one is like Hannah mentioned the thermal radiation. But if you are talking about the radiation that we use in radiotherapy that is different, earth gives radiation (by radiaoctive minerals) also universe gives radiation (Cosmic radiationor by the sun)
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