For example: soil for agriculture, wood, forests, uranium, gold, silver, copper, lead, zinc, coal, marble, tellurium, building stones, mineral waters, thermal waters, methane etc.
Christmas is the most important day in Romania.
The most important business is politics.
The most important country is Germany.
Christmas is probable the most important day for the religion in Romania; also is a traditional opportunity for great parties.
Textiles is the most important product for export.
The most important are industry and agriculture.
Romania has energy resources but not so abundant.
Of course, its a normal situation.
Europe's most important resources are coal, oil, lumber, water, livestock, etc.
Petroleum is one of Mexico natural resources but not the most important
Buffalo and water were the most important Natural Resources for the Great Plains Indians.
Nothing. Deal with it