While that's true, it's pretty relevant if you're trying to detect or measure human-caused climate changes. And particularly with respect to changes in both pop

While that's true, it's pretty relevant if you're trying to detect or measure human-caused climate changes. And particularly with respect to changes in both population growth and the effects of the industrial revolution. The planet went from having around 350 million people in 1000AD, to over 8 billion people now. We went from powering things with human and animal muscles and heating things with effectively carbon-neutral woodfires with only decades or centuries of captured carbon, to burning coal and oil releasing millions or hundreds of millions of years worth of captured carbon into the atmosphere.