CO2 is making Earth greener–for now Science
A study in Nature Climate Change shows significant greening on 25-50% of Earth's vegetated lands due to increased CO2 levels. This greening, twice the size of the US, benefits plant growth but contributes to climate change. Carbon dioxide explains 70% of the effect, impacting global cycles. Researchers warn of potential acclimatization over time.
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A study published in Nature Climate Change reveals that 25-50% of Earth's vegetated lands have experienced significant greening over the past 35 years due to increased atmospheric carbon dioxide levels. The greening, equivalent to twice the size of the continental United States, results from enhanced photosynthesis driven by higher CO2 concentrations. While beneficial for plant growth, rising CO2 is a major contributor to climate change. The study, involving satellite data analysis, indicates that carbon dioxide explains 70% of the greening effect, with nitrogen and other factors playing smaller roles. The increased plant growth impacts the global carbon and water cycles. However, researchers caution that plants may acclimatize to rising CO2 levels over time, diminishing the fertilization effect. The study underscores the complex interplay between carbon dioxide, plant growth, and climate change, highlighting the need for continued research and improved Earth system models.
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