Everyone knows plants need CO2 to grow. But does more CO2 make plants grow more and capture more CO2, mitigating climate change? Not likely, say a growing number of studies — most recently one that looked at centuries-old Canadian trees.

This story was originally published on CBC News. To read the rest of this news worthy story, please visit https://www.cbc.ca/news/technology/co2-trees-1.5000709?cmp=rss.

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