. 2022 Feb 28;25(4):103990. doi: 10.1016/j.isci.2022.103990

Table 2.

Carbon footprint of DAC systems with respect to several energy sources

Sorbent	Electricity	Heat	Carbon generated from heat (MtCO₂/year)	Carbon generated from electricity (MtCO₂/year)
Liquid	Solar	Natural Gas	0.47–0.66	0.01–0.03
Liquid	Wind	Natural Gas	0.47–0.66	0.004–0.009
Liquid	Nuclear	Natural Gas	0.47–0.66	0.01–0.02
Liquid	Natural Gas	Natural Gas	0.47–0.66	0.11–0.23
Liquid	Coal	Natural Gas	0.47–0.66	0.18–0.38
Solid	Solar	Solar	0.008–0.01	0.0004–0.008
Solid	Nuclear	Nuclear	0.004–0.005	0.002–0.004
Solid	Solar	Natural Gas	0.22–0.30	0.0004–0.008
Solid	Wind	Natural Gas	0.22–0.30	0.002–0.003
Solid	Natural Gas	Natural Gas	0.22–0.30	0.07–0.14
Solid	Coal	Coal	0.32–0.44	0.15–0.3