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The effect of CO2 on Geum Vernum

14 Jan 2026 | Science Notes

From the CO2Science archive: This week’s plant is native to Ontario and the northeast US and goes by the pleasant name of Spring Avens. And we can’t find any mention of people blasting it as an invasive weed or saying it’s toxic to horses or any of the usual complaints we read about the world’s plants. So here’s to Geum Vernum with its dainty little flowers. In 2013 a pair of experiments showed that an additional 300 ppm CO2 in the air caused an average 35.5 percent increase in its growth. Go Spring Avens.

2 comments on “The effect of CO2 on Geum Vernum”

  1. Mark Carneys self flagellation of Canada in the pursuit of net zero is ongoing and troublesome. I don’t get it.

  2. I love reading about increased CO2 effects on different plants every week.

    Quico Toro runs 1% brighter and makes a great point, of which this article reminded me.

    He points out:

    "...But if you don’t have all those layers of privilege, if you’re a poor person in a poor tropical country living on the edge of agro-ecological viability, then climate change might very well kill you. If you survive by farming one acre of sorghum and the variety you have can just about hang on at 41° C but will shrivel up and die at 43°, then climate change is life and death to you. Not in some high-fallutin’ rhetorical sense, but in the very specific sense that you’re not going to have anything to eat, and nobody’s going to come save you...."

    I hope you'll take a look at the plants that people in sensitive areas grow for sustenance, and how they are doing recently, temperature info about the places in which they grow, stuff like that. This Series is great, but I wonder if a more pragmatic focus might be more illuminating.

    Link to the Article: https://www.onepercentbrighter.com/p/yes-climate-is-a-crisis-no-not-for

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