Carbon Dioxide Passes a Grim Milestone
It was grim milestone when carbon dioxide, a key component in global warming, passed what scientists called “a long-feared milestone,” reaching a concentration not seen on this planet for millions of years.
The New York Times reported on Friday, “Scientific instruments showed that the gas had reached an average daily level above 400 parts per million – just an odometer moment in one sense, but also a sobering reminder that decades of efforts to bring human-produced emissions under control are faltering.”