As new CO2 milestone is reached, climate science and action grow inseparable » A plaque dedicated to Charles Keeling’s research into increasing CO2 concentrations in the atmosphere, as depicted by the famous “Keeling curve.” (Waging Nonviolence/Bryan Farrell)

A plaque dedicated to Charles Keeling’s research into increasing CO2 concentrations in the atmosphere, as depicted by the famous “Keeling curve.” (Waging Nonviolence/Bryan Farrell)

A plaque dedicated to Charles Keeling’s research into increasing CO2 concentrations in the atmosphere, as depicted by the famous “Keeling curve.” (Waging Nonviolence/Bryan Farrell)

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