The alarmists deliberately and deceptively refer to invisible essential trace gas carbon dioxide (CO2) as carbon (C). The deliberate deception is to confuse the unaware and let them think of dark grimy materials such as coal (mostly carbon) and graphite. But, no! Carbon dioxide is not black and grimy, it is an invisible trace gas.
Shiny, glistening Diamonds are also pure carbon. So, the Paul Simon song "Diamonds on the Soles of her Shoes" would be a perfect example of a carbon footprint.