CO2 Now


What the world needs to watch

Global warming is mainly the result of CO2 levels rising in the Earth’s atmosphere. Both atmospheric CO2 and climate change are accelerating. Climate scientists say we have years, not decades, to stabilize CO2 and other greenhouse gases.

To help the world succeed, makes it easy to see the most current CO2 level and what it means. So, use this site and keep an eye on CO2.  Invite others to do the same. Then we can do more to send CO2 in the right direction.

Watch CO2 now and know the score on global warming, practically in real time.

Earth's CO2 Home Page

CLICK HERE for daily CO2Now data updates.






Atmospheric CO2 for July 2014

Preliminary monthly average as of August 6, 2014

(Mauna Loa Observatory: NOAA-ESRL)


NOTE:  On May 10, 2013, NOAA & Scripps first reported daily averages that temporarily reached 400 ppm.

Current chart and data for atmospheric CO2

CO2 Data Set:

Original Scripps CO2 data file dated  Wednesday August 6, 2014

Measuring Location:

Mauna Loa Observatory, Hawaii


Why is CO2 significant?
Carbon dioxide (CO2) is the chief greenhouse gas that results from human activities and causes global warming and climate change. To see whether enough is being done at the moment to solve these global problems, there is no single indicator as complete and current as the monthly updates for atmospheric CO2 from the Mauna Loa Observatory.
What is the current trend?
The concentrations of CO2 in the atmosphere are increasing at an accelerating rate from decade to decade.   The latest atmospheric CO2 data is consistent with a continuation of this long-standing trend.
What level is safe?
The upper safety limit for atmospheric CO2 is 350 parts per million (ppm). Atmospheric CO2 levels have stayed higher than 350 ppm since early 1988.


Accelerating Rise of Atmospheric CO2


Accelerating CO2 TrendAtmospheric CO2 is accelerating upward from decade to decade.   

For the past ten years, the average annual rate of increase is 2.07 parts per million (ppm).   This rate of increase is more than double the increase in the 1960s.   

See the table below.  

Current Data for Atmospheric CO2

The world's most current data for atmospheric CO2 is measured at the Mauna Loa Observatoy in Hawaii.  Measurements are made and reported independently by two scientific institutions:  Scripps Institution of Oceanography and the National Oceanic and Atmospheric Administration (NOAA).  Monthly data is posted below.   

Mauna Loa CO2 Data Sets:

    Monthly     NOAA CO2 Data
    Weekly        NOAA CO2 Data

    Monthly    Scripps CO2 Data
Scripps CO2 Data

High Resolution CO2 Graphics

High Resolution CO2 Graphics 

Show the latest readings for atmospheric CO2 far and wide--and update them very month.   Since 2008, has been helping webmasters show the rising CO2 trend with CO2Now website widgets.  

As of 2014, high-resolutions versions of the widget graphics are now available for use by anyone, anywhere.  Use the graphics to show the CO2 numbers and trend in your media presentations, printed posters, newsletters, or books. Download the graphics here...

Annual Data | Atmospheric CO2

Annual Levels for Atmospheric CO2

Atmospheric CO2 (ppm)The 2013 average annual concentration of CO2 in the atmosphere (Mauna Loa Observatory) is 396.48 parts per million (ppm).   The 2012 average is 393.82 ppm.  

For the past decade (2004-2013) the average annual increase is 2.1 ppm per year.  The average for the prior decade (1994-2003) is 1.9 ppm per year.    Annual data for 2012 was first posted January 9, 2014, by NOAA-ESRL in the United States. 

Since the 1958 start of precision CO2 measurements in the atmosphere, the annual mean concentration of CO2 has only increased from one year to the next.   The CO2 data below provide a simple view of the annual trend. 

Global Temperature Update


July 6, 2014

Globally, May 2014 was the warmest May since global temperature records began in 1880.  Four of the five warmest Mays have occurred in the past five years.  The coolest on record was May 1907. [NOAA Global Monthly Analysis]

Annually, 2013 tied 2003 as the 4th warmest year globally since 1880.  Nine of the ten warmest years in the past 134 years occurred since the Year 2000.  Only one year during the 20th Century--1998--was warmer than 2013.  [NOAA Global Analysis 2013]


"The science is sobering—the global temperature in 2012 was among the hottest since records began in 1880. Make no mistake: without concerted action, the very future of our planet is in peril."

~ Christine Lagarde, Managing Director
International Monetary Fund