The sources are YouTube comments and a video transcript discussing a billion-dollar solar scam perpetrated by Jeff Kpof. The comments highlight public reactions to the scam, including skepticism about the product's capabilities and anger towards the perpetrators. The transcript details Kpof's background, his motivations for the scam, and the various individuals and companies he defrauded. The sources also discuss the role of government subsidies in fueling the scam and the consequences for those involved, including Kpof's eventual conviction and imprisonment.

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