2010 Progress Report - International Joint Commission

Progress Report 2010
The emission trends refl ected in Figures 28, 29,
and 30 for SO 2
, NO x
and VOCs, respectively, show
emissions from 1990 through 2008. Both countries
have seen major reductions in SO 2
emissions. In
Canada, the reductions in SO 2
emissions came from
the non-ferrous smelting and refi ning industry and
the electric power generation utilities. For NO x
, the
reductions were from on-road mobile sources, electric
power generation utilities, and the mining and rock
quarrying industry. For VOCs, the reductions came
from on-road mobile sources and the downstream
petroleum industry, with additional reductions from
various industrial sectors such as chemical, pulp and
paper, wood products, and iron and steel industries.
Figure 28. National SO 2
Emissions in the United States and Canada
from All Sources, 1990–2008
25
20
Million Tons
15
10
Million Tonnes
5
0
1990 1991 1992 1993 1994
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Canada
United States
Source: US EPA and Environment Canada 2010
Figure 29. National NO x
Emissions in the United States and Canada
from All Sources, 1990–2008
30
25
Million Tons
20
15
10
Million Tonnes
5
0
1990 1991 1992 1993 1994
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Canada
United States
Source: US EPA and Environment Canada 2010
46