| Country | Environment - current issues |
| Afghanistan | limited natural freshwater resources; inadequate supplies of potable water; soil degradation; overgrazing; deforestation (much of the remaining forests are being cut down for fuel and building materials); desertification; air and water pollution |
| Akrotiri | hunting around the salt lake; note - breeding place for loggerhead and green turtles; only remaining colony of griffon vultures is on the base |
| Albania | deforestation; soil erosion; water pollution from industrial and domestic effluents |
| Algeria | soil erosion from overgrazing and other poor farming practices; desertification; dumping of raw sewage, petroleum refining wastes, and other industrial effluents is leading to the pollution of rivers and coastal waters; Mediterranean Sea, in particular, becoming polluted from oil wastes, soil erosion, and fertilizer runoff; inadequate supplies of potable water |
| American Samoa | limited natural freshwater resources; the water division of the government has spent substantial funds in the past few years to improve water catchments and pipelines |
| Andorra | deforestation; overgrazing of mountain meadows contributes to soil erosion; air pollution; wastewater treatment and solid waste disposal |
| Angola | overuse of pastures and subsequent soil erosion attributable to population pressures; desertification; deforestation of tropical rain forest, in response to both international demand for tropical timber and to domestic use as fuel, resulting in loss of biodiversity; soil erosion contributing to water pollution and siltation of rivers and dams; inadequate supplies of potable water |
| Anguilla | supplies of potable water sometimes cannot meet increasing demand largely because of poor distribution system |
| Antarctica | in 1998, NASA satellite data showed that the antarctic ozone hole was the largest on record, covering 27 million square kilometers; researchers in 1997 found that increased ultraviolet light passing through the hole damages the DNA of icefish, an antarctic fish lacking hemoglobin; ozone depletion earlier was shown to harm one-celled antarctic marine plants; in 2002, significant areas of ice shelves disintegrated in response to regional warming |
| Antigua and Barbuda | water management - a major concern because of limited natural freshwater resources - is further hampered by the clearing of trees to increase crop production, causing rainfall to run off quickly |
| Arctic Ocean | endangered marine species include walruses and whales; fragile ecosystem slow to change and slow to recover from disruptions or damage; thinning polar icepack |