4Is Industrial the price of Development? http://www, worldbank.org/research/greening.
5OECD, Greening Tax Mires in OECD countries: a Preliminary Assessment, 2000.
6Allen Blackman and Winston Harrington "The usr of Economic Incentives in developing Countries: Lessons from International Exprience with Industrial Air Pllution" Discussion Paper 99-39.1999 Resources for the Future.