Mali
landlocked; divided into three natural zones: the southern,
cultivated Sudanese; the central, semiarid Sahelian; and the
northern, arid Saharan

Malta
the country comprises an archipelago, with only the three
largest islands (Malta, Ghawdex or Gozo, and Kemmuna or Comino)
being inhabited; numerous bays provide good harbors; Malta and
Tunisia are discussing the commercial exploitation of the
continental shelf between their countries, particularly for oil
exploration

Marshall Islands
the islands of Bikini and Enewetak are former US
nuclear test sites; Kwajalein atoll, famous as a World War II
battleground, surrounds the world's largest lagoon and is used as a
US missile test range; the island city of Ebeye is the second
largest settlement in the Marshall Islands, after the capital of
Majuro, and one of the most densely populated locations in the
Pacific

Mauritania
most of the population is concentrated in the cities of
Nouakchott and Nouadhibou and along the Senegal River in the
southern part of the country

Mauritius
the main island, from which the country derives its name,
is of volcanic origin and is almost entirely surrounded by coral
reefs; home of the dodo, a large flightless bird related to pigeons,
driven to extinction by the end of the 17th century through a
combination of hunting and the introduction of predatory species

Mayotte
part of Comoro Archipelago (18 islands)

Mexico
strategic location on southern border of US; corn (maize),
one of the world's major grain crops, is thought to have originated
in Mexico

Micronesia, Federated States of
four major island groups totaling
607 islands

Moldova
landlocked; well endowed with various sedimentary rocks and
minerals including sand, gravel, gypsum, and limestone

Monaco
second-smallest independent state in the world (after Holy
See); almost entirely urban