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A meter is included for each environmental issue, as illustrated above. Each meter reflects a trend over time for the indicator that best summarizes the environmental issue. It shows whether the indicator is deteriorating, remaining stable, or improving, and to what degree. Each graph depicting the data on which the meter is based appears first in its section and is accompanied by an explanation of how the trend was measured. In most cases, the meter calculations are based on a change over the past decade. The meters cannot be compared to each other. Each meter value should be seen only as a highlight of the rate of progress that is occurring in the issue. They do not allow comparisons of the relative importance of issues, and they do not show change with respect to specific science-based thresholds. Furthermore, the meters provide a national roll-up and therefore do not represent regional variation. |
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| Last updated: 2005-04-11 | Important Notices and Disclaimers | |
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