Why 1.5 degrees has failed as a climate messaging strategy

Focusing on limiting the increase in average global temperature to 1.5 degrees above preindustrial levels hasn’t stopped the climate crisis. How can we better communicate the issue?

In 2015, at COP21 in Paris, international leaders settled on a goal to limit global warming to 1.5 degrees Celsius. In the decade since, that has become both a rallying cry and a shorthand for climate action. At multiple United Nations climate conferences, it has been turned into a quippy plea to “keep 1.5 alive.” 

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