FIG.11.  Projected emissions trajectories under the innovation path for criteria pollutants: (a) sulfur dioxide (SO₂), (b) nitrogen oxides (NO_x), (c) carbon monoxide (CO), (d) particulate matter (PM₁₀), and (e) volatile organic compounds (VOC).

a) SO₂
b) NO_x
c) CO
d) PM₁₀
e) VOC