Contamination of water resources poses a problem in many parts of the country and stocks of some fish species show signs of overexploitation. While agriculture, livestock, forestry, fisheries and hunting have contributed only around 3.6% of Mexico’s GDP over the last few years (Chapter 1), these sectors remain very important for employment and livelihoods. Although ownership falls on rural communities, lack of technical and organisational capacity has hampered their sustainable management of forests.