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2010 Progress Report - International Joint Commission

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Figure 18. U.S. NO x<br />

Emission Trends in PEMA States, 1990–2008<br />

Thousand Tons<br />

4,000<br />

3,500<br />

3,000<br />

2,500<br />

2,000<br />

1,500<br />

3,500<br />

3,000<br />

2,500<br />

2,000<br />

1,500<br />

Thousand Tonnes<br />

Commitments<br />

1,000<br />

1,000<br />

500<br />

500<br />

0<br />

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2002 2003 2004 2005 2006 2007<br />

2008<br />

0<br />

( indicates data are not available)<br />

Industrial sources<br />

On-road transportation<br />

Other anthropogenic sources<br />

Non-industrial fuel combustion<br />

Non-road transportation<br />

Electric power generation<br />

Note: The scales in Figures 18–19 and 20–21 are significantly different.<br />

Source: US EPA <strong>2010</strong><br />

Figure 19. U.S. VOC Emission Trends in PEMA States, 1990–2008<br />

Thousand Tons<br />

4,000<br />

3,500<br />

3,000<br />

2,500<br />

2,000<br />

1,500<br />

1,000<br />

500<br />

3,500<br />

3,000<br />

2,500<br />

2,000<br />

1,500<br />

1,000<br />

500<br />

Thousand Tonnes<br />

0<br />

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2002 2003 2004 2005 2006 2007<br />

2008<br />

0<br />

( indicates data are not available)<br />

Industrial sources<br />

On-road transportation<br />

Other anthropogenic sources<br />

Non-industrial fuel combustion<br />

Non-road transportation<br />

Solvent utilization<br />

Note: The scales in Figures 18–19 and 20–21 are significantly different.<br />

Source: US EPA <strong>2010</strong><br />

31

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