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Bell peppers and CO2

09 Oct 2024 | Science Notes

From the CO2Science archive: another fall veggie here in Ontario, the hardy if unglamorous Capsicum annuum L. or bell pepper, green, red or yellow, appears well placed to thrive with extra CO2 in the air. From 1987 to 2019 there were 14 experiments showing that with an extra 300 ppm in the air the plants gain an extra 28.9% photosynthesis. With an extra 600 ppm in the air there were 3 studies yielding an average gain of 295.7% and with an extra 900 ppm in the air there were 9 results with an average gain of 202.2%. So whether you fry them, BBQ them, broil them or chop them up raw, you can expect them to be bigger as all that extra CO2 fills the air.

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