the forestry sector is also important the formal forestry sector is estimated to contribute more than usd billion or of the world s gdp and provide employment to million people fao concurrently forests particularly in the tropics provide habitat to of global terrestrial species and a variety of ecosystem services un spf fisheries play an important role for food security and nutrition and fishery trade is especially important for developing nations in some cases accounting for more than half of the total value of traded commodities fao