There are dozens of territories with no produced goods; new resources could be added. Hundreds contain fish, grains, fruits, spices, timber, and tropical hardwood, all fairly generic and could be traded to improve the balance.
This could include: lamb, goat meat, horse meat, beef, chicken, eggs, duck, leather, milk, eucalyptus, mahogany, ipe, brazilwood, ebony, oak, salmon, tuna, cod, tilapia, sardines, whales, rays, beans, kerosene, clean water, shoes, corn, olive oil, cinnamon, pepper, oranges, pears, mangoes, papaya, pineapples, peaches, apples, strawberries, grapes, melons, coconuts, soybeans, wheat, peas, vodka, tequila, rum, niobium, copper, nickel, zinc, lithium, graphite, graphene, plutonium, rubber, mechanical parts, and electronic components... For example!

@dj22119988 not for now

Do they have buildings?

@Admiral Francux fixed ;)

Just wanted to say, that potatoes and lithium don't have their provinces on the map

I honestly think that buildings of the new resources should be added with the new resources themselfes, because why there would be a resource, if you can't develop it's' productuion.

@Swollen not for now, but maybe in the future!

Does the resources have their special buildings for trade? this is a cool mod

@Admiral Francux ok I understand you, if there are more opinions that these images of basic resources in the game are ugly then I will think about making Resources+ Addons, where there will be among others these reworked images of resources. Thanks for the suggestion!

resources' images look a bit ugly for me , I prefer the original ones. Maybe you should just apply the new resources without chaning the old ones' graphics?