keeling curve

News

CO2 Levels Already Topped 400 PPM This Year, On Track To Cross Threshold For A Month

Published: 
Tue, 03/18/2014 - 4:02pm
Category: 
Energy

Last year, atmospheric carbon dioxide briefly crossed 400 parts per million for the first time in human history. However, it didn’t cross that threshold until mid-May. 

News

Keeling Curve Website Wants You To Know When CO2 Levels Hit 400 Parts Per Million

Published: 
Thu, 04/25/2013 - 11:07pm
Category: 
Energy

On Monday, Hawaii’s Mauna Loa Observatory measured CO2 levels in the air of 398.36 parts per million (ppm).

News

We've Hit the Carbon Level We Were Warned About. Here's What That Means.

Published: 
Mon, 05/13/2013 - 11:36pm
Category: 
Energy

Over the last couple weeks, scientists and environmentalists have been keeping a particularly close eye on the Hawaii-based monitoring station that tracks how much carbon dioxide is in the atmosphere, as the count tiptoed closer to a record-smashing 400 parts per million.