Fossil leaves prove elevated CO2 triggered greening 23M years ago

Washington DC (UPI) Aug 20, 2020
The links between rising carbon dioxide levels, global warming and greening trends have been confirmed by fossilized leaves from a 23 million-year-old forest. The leaves were found preserved in the sediment layers that once formed the bottom of a New Zealand lake. Paleontologists previously unearthed a diversity of plants, algae, spiders, beetle, flies and fungi from the ancient
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