Yes bananas are radioactive.
Granite counter tops, concrete, stucco and the sun put off ionizing radiation.
The sun is radio active enough so that had people been on Mars in 2017 when the last intense solar storm hit Mars they would have been dead from radiation poisoning by about 7x what they needed to be just barely dead.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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