It has been 28 years since the World Meteorological Organization issued the first state of the climate report in 1993. The report was initiated due to the concerns raised at that time about projected climate change. While understanding of the climate system and computing power have increased since then, the basic message remains the same, and we now have 28 more years of data that show significant temperature increases over land and sea, as well as other changes, such as sea-level rise, melting of sea ice and glaciers and changes in precipitation patterns.

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