# of operational ozone stations to
measure tropospheric ozone trends for greenhouse gases
1
2
3
0
10
25
50
75
100
% completion of upgrade and
operation of early detection of
air quality stations
N/A
20
30
60
% completion of study in North
Atlantic aimed at determining the
air-sea carbon dioxide flux
Number of additional data sets
developed and improved for detecting multi-decadal and multi-century changes and variations in climate
19
16
15