Friend, if you're going to say the sun is cooling or whatever on the same forum where that post happened, a little more lighthearted fun at your expense may happen.][/QUOTE
As I said, the amount of sunlight reaching the planet's surface, is the main factor and my 9/11 example showed just one small factor that obscures everyday sunlight that was no there, say before the many thousands of jets constantly crossing the sky's, prior to 1950, for example.
Just as any effect that results from multiple causes, even in tiny percentages, the totality of the condition is often no as simple as a singular cause, but significant, in impact, none the less.
That includes solar cycles, whatever the fractional real world numbers may be.