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Earth’s carbon dioxide levels hit a 3 million year high – Salon

  1. Earth’s carbon dioxide levels hit a 3 million year high  Salon
  2. Climate change: Greenhouse gas concentrations again break records  BBC News
  3. Carbon dioxide in Earth’s atmosphere reaches record high, researchers say  NBCNews.com
  4. Greenhouse gases reach new peak in 2018, UN says  AOL
  5. Carbon dioxide reaches record high in Earth’s atmosphere, scientists report  USA TODAY
  6. View full coverage on Google News