Resources

City resources
City resources are specific to each City.

Culture
When a City's Culture bar fills a positive Event occurs and the city's Culture Level increases. Culture is primarily increased by building Shrines and Odeons, training certain Specialists, adopting certain Laws or spreading a Religion to a City.

National resources
National resources are refined from natural resources and used directly by a Nation. Some national resources can be bought and sold for Money. The option will appear by hovering over the resource.
 * Regular click buys 1 resource
 * SHIFT+click buys 10 resources
 * CTRL+click buys 100 resources

Natural resources
Natural resources appear on certain hexes on the map and can be refined into national resources in three ways:
 * Having the natural resource within the Nation's borders provides a small amount of national resources each year
 * Constructing a certain improvement on the natural resource provides a large amount of national resources each year
 * Certain units may harvest from the natural resource every couple of years, providing a large amount of national resources