FACTOID # 5: There are more known reptile species in Australia than in all other listed countries combined.

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## Correlations > Environment Statistics > Expenditure pollution control as % of GDP

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### Correlations between Environment > Expenditure pollution control as % of GDP ...

A correlation is a statistical measure of similarity between at least two given sets of data. NationMaster's correlations compare two variables from our database and reveal statistical relationships between them. The percentages you see represent the strength (or likelihood) that a change in the topic variable is matched by a change in the listed variables below it. But remember: These correlations do not imply causation, that is, one does not necessarily cause the other. Also, not all variables contain all countries, rather subsets of countries matched together.

#### NOTES:

• Outliers have been removed only where they are outside 3 standard deviations of the mean.
• Only variable pairs where at least 15 countries match for each have been considered.
• Strength is given by the correlation coefficient (R squared). It is the fraction of variation in Y that can be attributed to the variation in X. 100% signifies a perfect fit (R squared of 1). The top 50 such stats are displayed

DEFINITION: Expenditure on pollution controland abatement as % of GDP, 1999 .

SOURCE: OECD Environmental Indicators, p. 104. See also Myriam Linster and Frederique Zegel, 'Pollution Abatement and Control in OECD Countries', OECD Working Group on Environmental Information and Outlooks at www.oecd.org