I suppose you mean radioactivity rather than radiation. Yes, there is plenty of natural radioactivity – in addition to uranium, there are many natural radioactive isotopes of other elements including but not limited to thorium, radon, and potassium.
If you actually did mean radiation, then the sun’s rays, the heat of the earth, and more are examples of natural radiation.
Yes – there are naturally occurring radioactive elements. Rocks and minerals can have naturally occuring radiation, uranium, and carbon-14. as well.
Radon is one of the leading sources of natural radiation and the second leading cause of lung cancer. It can be found in soil or pretty much anywhere.
Cosmic Radiation (found in space) is also found on earth as not all of it is filtered out by our atmosphere.
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