An important example is small-scale wood and charcoal use by rural households in developing nations worldwide. Over-harvesting forest resources means reduced availability of the biomass resource for fuel and other purposes. The impacts are described in the main report, and include emissions of greenhouse gases and a range of air pollutants, contamination of land, surface water, and groundwater, radioactive waste issues, deforestation and compounding impacts such as habitat loss, soil erosion, reduced water retention, and downstream impacts, and consequential social, economic, and human health impacts. The structure and responsibilities of government ministries/departments vary from country to country, but the agencies responsible for the following sectors are all “key actors”: Environment, Energy, Natural Resources (forestry, water, land, and mining), Agriculture, Rural Development, and energy using sectors (transportation, industry, housing, etc.)