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They can tell a lot of stuff, most importantly what you said: more watts in, less watts in. That's about it. Can he explain to me the impact that an increase or decrease in watts will have related to Earth's absorption capacity? Can he explain how much does increased sun activity measure compared to plants' and humans' production of energy? Can he explain the effects of an increased or decreased solar output in Earth considering N different endogen factors?
Besides, how exactly can you show me evidence the sun activity IS directly responsible for long-trend climactic changes, and that those changes aren't really of increased temperatures?
And lastly, even if climate change isn't real and whatnot, why would you still oppose climate change's utmost goals - the change for a more sustainable society? Because, regardless of "political/financial gains" a "hoax climate change campaign" might have, it is undeniable that its defining aspect is a call for sustainability & environmental friendliness. And I'm not talking about what you might perceive as "shiite environmentalism", I'm talking about structural changes for the better that are honestly long required, such as less usage of fossil fuels, more usage of nuclear energy, recycling, increase in green areas, stuff like that.
So we just toss out your initial argument as based on a poor choice of an example? No problem. In logic, you would be said to have set up a straw man argument, easily defeated. But the article doesn't support even your straw man argument, so I thought to bring that to your attention.
Obviously the primary mover of climate is the Sun. Astrophysicists vary in their work, but many certainly can and do talk about the Sun as it affects planetary atmospheres. Others may be concerned only with internal solar dynamics, etc. Still others focus on cosmic rays, solar wind, space weather, many things. Primary evidence of sun affecting climate is night and day, winter and summer, and the periodic ice ages and such.
There was a semi-political attempt starting maybe in the 1990s to minimize the effects of the sun on earth's climate, so that the effect of man's emissions could be brought into the forefront and seem more "alarming." For example, Al Gore's initial movies and presentation of the "hockey stick" did not show the Little Ice Age or the Medieval Warm period. This was an attempt to box in "natural climate variability" as fairly insignificant. That's pretty much debunked today. Although this is best expressed with phrases like "high or low uncertainty," rather than absolute certainty.
You can't go wrong being skeptical when someone is absolutely certain of something, particularly in a mathematically chaotic environment like climate.
Bolded above, isn't that a sort of rhetorical statement that assumes a stereotyped "enemy?" You don't know anything of what I oppose or not. But to respond, ambiguous, feel good phrases like "Sustainable society" really obscure the platform rather than explain it. Same with "environmental friendliness." Recycling is fine when it's not totally ridiculous, which isn't infrequent. Is Recycling an unqualified good? No, of course not. We're on the same page on the need for increases in productive nuclear energy.