Photons deep inside the sun

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Photons born deep inside the sun take millions of years to reach the surface.
This makes it unlikely that the warming of the Earth's atmosphere today(greenhouse effect) can be attributed to increased solar output from a
"deep sun" process - the timing would be too unlikely.Could a surface phenomenon,like an increase in doubly ionised helium,account for an increase in solar output by our sun and could such a process cause the kind of temperature increases weare seeing in the Earth's atmosphere today?
 

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