an Samoa
limited natural fresh water 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 coming 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 fresh water 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

Argentina
environmental problems (urban and rural) typical of an
industrializing economy such as deforestation, soil degradation,
desertification, air pollution, and water pollution
note: Argentina is a world leader in setting voluntary greenhouse
gas targets

Armenia
soil pollution from toxic chemicals such as DDT; the energy
crisis of the 1990s led to deforestation when citizens scavenged for
firewood; pollution of Hrazdan (Razdan) and Aras Rivers; the
draining of Sevana Lich (Lake Sevan), a result of its use as a
source for hydropower, threatens drinking water supplies; restart of
Metsamor nuclear power plant in spite of its location in a
seismically active zone

Aru