evidence: Fact check: Misleading data used in claim alleging a global cooling trend [...] But on social media, some claim NOAA data actually show global cooling since 2015. [...] The caption says the chart shows 0.9 C of cooling per decade, but it actually shows 0.09 C – 10 times less. And this is cherry-picked data that contradicts the overall trend: Temperatures show a clear global warming trend since 1880.