Climate scientists know with impressive accuracy how fast carbon dioxide is increasing in the atmosphere. A decade ago, there were about 370 parts per million of the heat-trapping gas floating around; today, the number is up to 393 or so. Much of that increase comes from the burning of fossil fuels like coal, gas and oil – but not all, and putting numbers on other sources is crucial to figuring out how to keep carbon emissions under control. This Business Spectator article discusses work by researchers at the Nicholas Institute for Environmental Policy Solutions in the journal PLOS ONE.
