· Non-marketed goods. The environment provides many goods which are not sold, but which are nevertheless of value; ., fuelwood and building materials gathered in forests, meat and fish captured for consumption, and medicinal plants . Some countries do include these in their national income accounts, estimating total consumption, and then using market prices for comparable products as a proxy to calculate the value of non- marketed goods. However, such estimation is incomplete, and cannot always be disaggregated from products which are sold. · Non-marketed services. Similarly, the environment provides unsold services, such as watershed protection by forests or water filtration by submerged vegetation. These are not included in.
