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those that do not replenish themselves in one person's lifetime.
the fraction or proportion of income that households spend on consumption
the integration of economic activities throughout the world by breaking down national barriers...
predicting the future path of a variable such as the business cycle on the basis of how it has...
the variation of life forms within a given ecosystem; often used as a measure of the health of...
responsible travel that conserves and sustains the environment and the welfare of local people...