(Limitations of National Income Accounting) One often-heard criticism of the U.S. national income accounts is that they ignore the effect of environmental pollution. The World Bank's group on Environmental Economics and Indicators has been investigating ways of assessing environmental degradation. Take a look at their work on "green accounting" at https://lnweb18.worldbank.org/ESSD/envext.nsf/ 44ByDocName/GreenAccounting. What kinds of problems have they identified, and what proposals have they made to deal with those problems?