Table 2.

Anthropogenic and biogenic emissions compared to base year (2005) emissions in the US.

	Present climate				2005(Tg)	RCP 4.5			RCP 8.5
	2001	2002	2003	2004		2057	2058	2059	2057	2058	2059
CO	1.142	1.194	1.129	1.065	93.030	0.272	0.268	0.264	0.246	0.243	0.240
NOx	1.139	1.117	1.078	1.039	18.914	0.342	0.338	0.334	0.493	0.487	0.482
PM10	1.121	1.008	1.006	1.003	21.149	0.552	0.552	0.551	0.542	0.540	0.538
PM2.5	1.282	1.022	1.015	1.007	5.456	0.761	0.754	0.747	0.422	0.417	0.413
SO2	1.092	1.012	1.008	1.004	14.594	0.169	0.166	0.163	0.148	0.137	0.126
NMVOC	0.929	1.149	1.112	1.074	18.421	0.632	0.630	0.628	0.314	0.310	0.306
BG-VOC1	0.913	0.971	1.008	0.993	31.739	1.111	1.098	1.173	1.266	1.212	1.275
T-VOC2	0.919	1.036	1.046	1.023	50.160	0.935	0.926	0.973	0.916	0.881	0.919
NH3	0.904	1.012	1.008	1.004	4.085	1.254	1.253	1.252	1.536	1.544	1.551
CH43	1.202	1.187	1.172	1.156	32.180	0.893	0.888	0.883	1.612	1.626	1.640
BC	1.007	1.005	1.004	1.002	0.394	0.723	0.716	0.709	0.264	0.262	0.260
OC	1.145	1.109	1.073	1.036	1.141	1.060	1.051	1.042	0.609	0.606	0.604

¹BG-VOC indicates biogenic VOC emissions.

²T-VOC indicates the summation of anthropogenic NMVOC and biogenic VOC.

³CH₄ indicates methane emissions.