There are currently five resources in Empire Earth. The only resource that probably will not be used throughout the game is Iron. Also unlike most games the Resources Information will be at the bottom instead of the top of the screen. Food Food is needed in the entire game to supply your civilization's population.
Players can get food by hunting, fishing, farming, and foraging.
Farms don't need to be replanted unless destroyed. Players can probably get wood by cutting trees down. Since there're so many trees in maps, players shouldn't have a problem finding some. Gold Gold will probably not be very important until the Copper or Bronze Epoch where it'll be used to create weapons and other things. Players can get gold by mining it from the ground.