Extended Data Table E4.

Percent change in nutrient content at elevated [CO2] compared with ambient [CO2] for all nutrients 

	C3 grasses						C3 legumes						C4 grasses
	Wheat			Rice			Field Peas			Soybean			Maize			Sorghum
	%	95% CI	P-value	%	95% CI	P-value	%	95% CI	P-value	%	95% CI	P-value	%	95% CI	P-value	%	95% CI	P-value
Zinc (ppm)	−9.3	(−12.7, −5.9)	<.0001	−3.3	(−5.0, −1.7)	<.0001	−6.8	(−9.8, −3.8)	<.0001	−5.1	(−6.4, −3.9)	<.0001	−5.2	(−10.7,0.6)	0.077	−1.3	(−6.2,3.8)	0.603
Iron (ppm)	−5.1	(−6.5, −3.7)	<.0001	−5.2	(−7.6, −2.9)	<.0001	−4.1	(−6.7, −1.4)	<.0001	−4.1	(−5.8, −2.5)	<.0001	−5.8	(−10.9, −0.3)	0.038	1.6	(−5.8,9.7)	0.674
Phytate (mg/g)	−4.2	(−7.5, −0.8)	0.009	1.2	(−4.6,7.4)	0.70	−5.8	(−11.5,0.1)	0.055	−1.3	(−3.7,1.2)	0.303	−6.1	(−15.0,3.7)	0.215	12.8	(−15.8,51.1)	0.418
Protein	−6.3	(−7.5, −5.2)	<.0001	−7.8	(−8.9, −6.8)	<.0001	−2.1	(−4.0, −0.1)	0.039	0.5	(−0.4,1.3)	0.267	−4.6	(−13.0,4.5)	0.312	0.0	(−4.9,5.2)	0.993
Mn (ppm)				−7.5	(−12.0, −2.8)	0.00	−2.5	(−4.2, −0.8)	0.005	−1.4	(−3.5,0.8)	0.204	−4.2	(−10.5,2.5)	0.215	1.7	(−4.5,8.3)	0.596
Mg (%)				−0.9	(−2.3,0.6)	0.24	0.0	(−1.3,1.4)	0.960	−3.5	(−4.3, −2.8)	<.0001	−5.7	(−9.9, −1.3)	0.011	−0.2	(−5.1,4.9)	0.944
Cu (ppm)				−10.6	(−13.8, −7.1)	<.0001	−2.7	(−5.1, −0.3)	0.025	−5.7	(−8.0, −3.4)	<.0001	−9.9	(−19.3,0.7)	0.066	−2.9	(−7.1,1.5)	0.190
Ca (%)				2.0	(−0.8,4.9)	0.16	−0.5	(−4.2,3.3)	0.787	−5.8	(−7.3, −4.2)	<.0001	−2.7	(−16.9,13.9)	0.734	11.2	(−5.2,30.3)	0.190
S (ppm)				−7.8	(−8.8, −6.8)	<.0001	−2.2	(−3.6, −0.7)	0.003	−2.9	(−3.5, −2.2)	<.0001	2.1	(−2.2,6.7)	0.342	−0.2	(−5.4,5.2)	0.936
K (%)				1.1	(−0.3,2.5)	0.13	2.2	(0.6,3.8)	0.008	0.1	(−0.8,1.0)	0.857	−2.7	(−3.1, −2.2)	<.0001	3.0	(−2.7,9.1)	0.308
B (ppm)				5.1	(1.9,8.4)	0.002	−1.9	(−3.9,0.1)	0.057	−6.4	(−9.1, −3.6)	<.0001	4.9	(−1.0,11.1)	0.107	−0.3	(−9.3,9.6)	0.952
P (%)				−1.0	(−2.4,0.4)	0.16	−3.7	(−6.8, −0.5)	0.023	−0.7	(−2.2,0.9)	0.379	−7.1	(−9.0, −5.1)	<.0001	0.3	(−4.0,4.9)	0.881