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Halcyon actively monitors change covering more than 150 key elements of life.

A Mundane Comedy is Dom Kelleher's new book. Extracts will appear on this site and across social media from early 2022. Please get in touch with any questions or thoughts.

The 52:52:52 project, launching both on this site and on Twitter in early 2022 will help you address 52 issues with 52 responses over 52 weeks.

Carbon

CO2 levels in the atmosphere

"The MLO" is the Mauna Loa Observatory in Hawaii, USA. This is the famous but remote station where scientists have been measuring CO2 in the air for the longest time. Data at Mauna Loa produced the iconic Keeling Curve. The pioneering work of Charles David Keeling provided key, new insights about how the earth system works.

Atmospheric CO2