Appendix (explanation of symbols in tables)
Environmental Indicators for Bulgaria
| Socio-Economic Developments | P | Population; Population density; GDP |
| R | Environmental protection and management expenditures; EIA; Structure of environmental protection administration; Env. charges; Integration with EC environmental policy; International co-operation | |
| Climate Change | P | Primary energy consumption by sector; Air emissions of CH4, N2O, CO2 |
| S | Air temperature, humidity | |
| R | ||
| Acidification | P | Air emissions of SO2, NOx, NH3 from stationary sources by sector; SO2, NOx, dust emission from energy and industrial plants; Number of motor vehicles |
| S | Air quality index; pH of precipitation | |
| R | Air quality monitoring network | |
| Tropospheric Ozone | P | Total CO and NMVOC emissions |
| S | ||
| R | ||
| Land | P | Emissions of heavy metals; Discharges and emission of radioactive substances; Area of landfills |
| S | Background conc. of metals in soils; Background radioactivity; Area of damaged land; Areas of land by soil buffer capacity against acidification; Areas of salinized soils | |
| R | Radioactivity monitoring network | |
| Marine and Coastal Environm. | P | Waste water discharges; Emissions of heavy metals; Discharge and emission of radioactive substances |
| S | ||
| R | ||
| Biodiversity Loss | P | |
| S | Abundance of main animal species | |
| R | Protected areas by type, number, area | |
| Forests | P | |
| S | Tree defoliation in mountains by species, by apparent cause | |
| R | ||
| Eutrophication & Water Quality | P | Waste water discharges (total, industrial, and municipal); Emissions of heavy metals; Discharges and emission of radioactive substances |
| S | BOD/DO in rivers; Water quality in rivers; Physical-chemical monitoring; Hydrobiological monitoring; Background conc. of heavy metals in soils; Background radioactivity | |
| R | Surface water quality monitoring network; WWTP capacity; Share of waste water discharged without treatment; Radioactivity monitoring network | |
| Water Resources & Quantity | P | Irrigated land |
| S | Water reserves per capita, surface/ground; Density of river network; River flow | |
| R | ||
| Urban Air Quality | P | |
| S | Air quality in cities (CO2, NOx, dust) | |
| R | ||
| Urban Population, Land Use & Transport | P | Total urban and rural population: state and trends; Urbanization level |
| S | ||
| R | ||
| Waste & Noise | P | Waste generation: industrial - total, municipal - total and per capita, hazardous by category by city; Waste accumulation; Area of landfills |
| S | Noise in urban settlements | |
| R |