Mapping the moral high ground on fossil fuels
The so-called Suess effect in radiocarbon (14C) has been known for decades. Geological sources of carbon like coal and oil, that formed many millions of years ago, long since lost their radiocarbon through radioactive decay – they contain 14C-free “dead” carbon. From the mid-19th century the radiocarbon activity of the atmosphere declined as dead carbon from fossil fuels was dug out of the ground and burnt producing carbon dioxide (CO2) in the atmosphere.