 During the 1980s, Natural Resources Code and the 1979 National Sanitation Law were developed through numerous regulations such as the Watershed Decree 2857 of 1981, Atmospheric Releases Decrees 02 of 1982 and 2200 of 1983, and the Water Quality Decree 1594 of 1984.The new constitution of 1991 included 49 articles for environmental and natural resources protection and was considered for some experts as the “Environmental Constitution.” Finally, Law 99 of 1993 established the current institutional framework in Colombia, in particular it