| Country | Environment - current issues |
| Bahrain | desertification resulting from the degradation of limited arable land, periods of drought, and dust storms; coastal degradation (damage to coastlines, coral reefs, and sea vegetation) resulting from oil spills and other discharges from large tankers, oil refineries, and distribution stations; lack of freshwater resources (groundwater and seawater are the only sources for all water needs) |
| Bangladesh | many people are landless and forced to live on and cultivate flood-prone land; water-borne diseases prevalent in surface water; water pollution, especially of fishing areas, results from the use of commercial pesticides; ground water contaminated by naturally occurring arsenic; intermittent water shortages because of falling water tables in the northern and central parts of the country; soil degradation and erosion; deforestation; severe overpopulation |
| Barbados | pollution of coastal waters from waste disposal by ships; soil erosion; illegal solid waste disposal threatens contamination of aquifers |
| Belarus | soil pollution from pesticide use; southern part of the country contaminated with fallout from 1986 nuclear reactor accident at Chornobyl' in northern Ukraine |
| Belgium | the environment is exposed to intense pressures from human activities: urbanization, dense transportation network, industry, extensive animal breeding and crop cultivation; air and water pollution also have repercussions for neighboring countries; uncertainties regarding federal and regional responsibilities (now resolved) had slowed progress in tackling environmental challenges |
| Belize | deforestation; water pollution from sewage, industrial effluents, agricultural runoff; solid and sewage waste disposal |
| Benin | inadequate supplies of potable water; poaching threatens wildlife populations; deforestation; desertification |
| Bermuda | sustainable development |
| Bhutan | soil erosion; limited access to potable water |
| Bolivia | the clearing of land for agricultural purposes and the international demand for tropical timber are contributing to deforestation; soil erosion from overgrazing and poor cultivation methods (including slash-and-burn agriculture); desertification; loss of biodiversity; industrial pollution of water supplies used for drinking and irrigation |
| Bosnia and Herzegovina | air pollution from metallurgical plants; sites for disposing of urban waste are limited; water shortages and destruction of infrastructure because of the 1992-95 civil strife; deforestation |
| Botswana | overgrazing; desertification; limited fresh water resources |
| Bouvet Island | NA |
| Brazil | deforestation in Amazon Basin destroys the habitat and endangers a multitude of plant and animal species indigenous to the area; there is a lucrative illegal wildlife trade; air and water pollution in Rio de Janeiro, Sao Paulo, and several other large cities; land degradation and water pollution caused by improper mining activities; wetland degradation; severe oil spills |
| British Indian Ocean Territory | NA |
| British Virgin Islands | limited natural fresh water resources (except for a few seasonal streams and springs on Tortola, most of the islands' water supply comes from wells and rainwater catchments) |
| Brunei | seasonal smoke/haze resulting from forest fires in Indonesia |
| Bulgaria | air pollution from industrial emissions; rivers polluted from raw sewage, heavy metals, detergents; deforestation; forest damage from air pollution and resulting acid rain; soil contamination from heavy metals from metallurgical plants and industrial wastes |
| Burkina Faso | recent droughts and desertification severely affecting agricultural activities, population distribution, and the economy; overgrazing; soil degradation; deforestation |
| Burma | deforestation; industrial pollution of air, soil, and water; inadequate sanitation and water treatment contribute to disease |
| Burundi | soil erosion as a result of overgrazing and the expansion of agriculture into marginal lands; deforestation (little forested land remains because of uncontrolled cutting of trees for fuel); habitat loss threatens wildlife populations |
| Cambodia | illegal logging activities throughout the country and strip mining for gems in the western region along the border with Thailand have resulted in habitat loss and declining biodiversity (in particular, destruction of mangrove swamps threatens natural fisheries); soil erosion; in rural areas, most of the population does not have access to potable water; declining fish stocks because of illegal fishing and overfishing |
| Cameroon | waterborne diseases are prevalent; deforestation; overgrazing; desertification; poaching; overfishing |
| Canada | air pollution and resulting acid rain severely affecting lakes and damaging forests; metal smelting, coal-burning utilities, and vehicle emissions impacting on agricultural and forest productivity; ocean waters becoming contaminated due to agricultural, industrial, mining, and forestry activities |