The year 2021 tied for sixth warmest year on record, continuing a long-term upward trend since 1880 due to human activities, like burning fossil fuels. The temperature record takes in millions of observations from various instruments around the globe: https://climate.nasa.gov/news/3140/2021-tied-for-6th-warmest-year-in-continued-trend-nasa-analysis-shows/ Video: Global warming from 1880 to 2021. The first frame in this sequence represents the data from 1880 to 1884. The second frame represents 1

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