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Herbicide Loses Effectiveness at Higher CO2

Herbicide Loses Effectiveness at Higher CO2

The left photo shows weeds in a plot grown at a carbon dioxide (CO2) concentration of about 380 parts per million (ppm), which approximates the current level. The right photo shows a plot in which the CO2 level has been raised to about 680 ppm. Both plots were equally treated with herbicide.1

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Summary

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Photo CreditLewis Ziska - USDA ARS