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Figure 1 
U.S. Global Change Research Program by Science Element

[[image - bar graph for FY 1989 and FY 1990.]]

Budget by Science Element
From a scientific perspective, the best way to understand the global change research budget is to examine it by the major science elements. Figure 1 presents the FY 1989 and FY 1990 budgets by science elements.

•Biogeochemical Dynamics: These programs concentrate on the study of the biogeochemical constituents (e.g., oxygen, carbon, nitrogen, etc.) within the earth system and their influence on the life-sustaining envelope of the earth, including a global warming. The FY 1990 budget proposes $44.9 million for this element, a 51 percent increase over the FY 1989 level.

Ecological Systems and Dynamics:  These programs focus on how ecological systems both impact and respond to a wide range of global changes.  The FY 1990 budget proposes $39.5 million for this element, a 41 percent increase over the FY 1989 level.