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By Kenneth Richard on 19. July 2021
Since the last day of 2001 CO2 has risen from 372 to 419 ppm. However, there have been two cooling periods of 12 years (2002-2014) and 7.5 years (2014-2021), separated by a 1.5-year El Niño-induced warming event (2015-2016). Temperature changes that proceed in step- or event-like fashion do not seem to correlate well with linearly-rising […]