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CO2earthã«ããã¨ã大æ°ä¸ã®CO2æ¿åº¦ã¯ã2021å¹´2æ10æ¥ç¾å¨ã417.79ppmã§ä¸çæé«ãè¶ ãã模æ§ã ã <blockquote class="twitter-tweet"><p lang="en" dir="ltr">ð 417.79 ppm <a href="https://twitter.com/hashtag/CO2?src=hash&ref_src=twsrc%5Etfw">#CO2</a> in the atmosphere February 10, 2021 ð Up from 416.08 ppm a year ago ð Mauna Loa Observatorâ¦</p></blockquote>