[PIF]

“Ruddiman and his colleagues found that that carbon dioxide levels rose beginning 7,000 years ago, and methane began rising 5,000 years ago” and then, after using very big words that mean absolutely nothing, they applied for their next multi-million dollar grant ...

[N. Theknow]

"Ruddiman and his colleagues found that that carbon dioxide levels rose beginning 7,000 years ago, and methane began rising 5,000 years ago"

So...mankind started exhaling 7,000 years ago, but did not start farting for another 2,000 years?