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Halcyon's 52:52:52 campaign on this site and on Twitter will start in late 2020. It will help you address 52 issues with 52 responses over 52 weeks.

Part consultancy, part thinktank, part social enterprise, Halcyon helps you prepare for and respond to personal, organisational and societal change.

A Mundane Comedy is Halcyon's new book. Extracts will appear on this site and on social media during late 2020. Please get in touch with any questions about the book or related Halcyon services.

Halcyon monitors change for more than 150 key elements of life.

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