imited natural
fresh water resources away from the Senegal which is the only
perennial river

Mauritius:
water pollution, degradation of coral reefs

Mayotte:
NA

Mexico:
natural fresh water resources scarce and polluted in north,
inaccessible and poor quality in center and extreme southeast; raw
sewage and industrial effluents polluting rivers in urban areas;
deforestation; widespread erosion; desertification; serious air
pollution in the national capital and urban centers along US-Mexico
border

Micronesia, Federated States of:
overfishing

Midway Islands:
NA

Moldova:
heavy use of agricultural chemicals, including banned
pesticides such as DDT, has contaminated soil and groundwater;
extensive soil erosion from poor farming methods

Monaco:
NA

Mongolia:
limited natural fresh water resources in some areas;
policies of the former communist regime promoting rapid urbanization
and industrial growth have raised concerns about their negative
effects on the environment; the burning of soft coal in power plants
and the lack of enforcement of environmental laws have severely
polluted the air in Ulaanbaatar; deforestation, overgrazing, the
converting of virgin land to agricultural production have increased
soil erosion from wind and rain; desertification and mining
activities have also had a deleterious effect on the environment

Montserrat:
land erosion occurs on slopes that have been cleared for
cultivation

Morocco:
land degradation/desertification (soil erosion resulting
from farming of marginal areas, overgrazing, destruction of
vegetation); water supplies contaminated by raw sewage; siltation of
reservoirs; oil pollution of coastal waters

Mozambique:
a long civil war and recurrent drought in the
hinterlands have resulted in increased migration of the population
to urban and coastal areas with adverse environmental consequences;
desertification; pollution of surface and coastal waters

Namibia:
very limited natural fresh water resources; desertification

Nauru:
limited natural fresh water resources, roof storage tanks
collect rainwater, but mostly dependent on a single, aging
desalination plant; intensive phosphate mining during the past 90
years - mainly by a UK, Australia, and NZ consortium - has left the
central 90% of Nauru a wasteland and threatens limited remaining
land resources

Navassa Island: