Maybe the estimate will be right this time, and maybe the previous estimates were right too, in some technical sense, but the people making these predictions need to ask whether their repeated contradictory-sounding warnings are doing more harm than good. For perspective:
* 2021 - John Kerry says Earth has 9 years to avert the worst consequences of climate crisis: "There's no faking it on this one"[0]
* 2019 - Only 11 Years Left to Prevent Irreversible Damage from Climate Change, Speakers Warn during General Assembly High-Level Meeting[1]
* 2018 - We have 12 years to limit climate change catastrophe, warns UN[2]
* 2012 - Two years left to curb climate change, Government warned[3]
* 2011 - World headed for irreversible climate change in five years, IEA warns[4]
* 2009 - 'We have only four years left to act on climate change - America has to lead'[5]
* 2021 - John Kerry says Earth has 9 years to avert the worst consequences of climate crisis: "There's no faking it on this one"[0]
* 2019 - Only 11 Years Left to Prevent Irreversible Damage from Climate Change, Speakers Warn during General Assembly High-Level Meeting[1]
* 2018 - We have 12 years to limit climate change catastrophe, warns UN[2]
* 2012 - Two years left to curb climate change, Government warned[3]
* 2011 - World headed for irreversible climate change in five years, IEA warns[4]
* 2009 - 'We have only four years left to act on climate change - America has to lead'[5]
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[0] https://www.cbsnews.com/news/climate-change-9-years-john-ker...
[1] https://www.un.org/press/en/2019/ga12131.doc.htm
[2] https://www.theguardian.com/environment/2018/oct/08/global-w...
[3] https://www.walesonline.co.uk/news/wales-news/two-years-left...
[4] https://www.theguardian.com/environment/2011/nov/09/fossil-f...
[5] https://www.theguardian.com/environment/2009/jan/18/obama-cl...