Renewable sources
Before the Launch Update everything apart from wolframite and tungsten is renewable. After the Launch Update everything seems to be renewable.
Lists below show data from before the Launch Update.
There are geysers/volcanos for:
- liquids
- water/steam
- polluted water
- magma/lava
- iron, copper, gold (liquid)
- oil
- Gases
- carbon dioxide
- hydrogen
- polluted oxygen
- chlorine
- natural gas
out of those resources you can already transform most resources.
Additionally you can bring almost anything back from space depending on the visited planet.
(only listing resources)
- Coal based
- Refined Carbon / Coal / Diamond
- Metal
- Ore Iron / Copper
- Refined Iron / Copper / Steel
- Stones
- Obsidian / Sedimentary Rock / Igneous Rock / Regolith / Mafic Rock / Abyssalite / Magma
- Glass
- Water / Ice
- Polluted Water
- Gases
- Solid Carbon Dioxide / Oxygen / Methane
- Carbon Dioxide / Oxygen / Natural Gas / Hydrogen
- Organic
- Slime / Algae / Dirt
And finally you can now print some elements and other stuff with your printing pod.
(only listing resources)
- Organics
- Dirt
- Algae
- Fertilizer
- Water / Ice
- Oxylite
- Metal
- Ore (Copper, Gold Amalgram)
- Refined (Copper, Gold, Iron)
- Steel
- Plastic
And last but not least. Since you are already sending rockets to space, you can also catch the exhaust of your rockets and the meteor showers for some additional carbon dioxide and steam.
And finally least (thanks to @ThisRandomGuy), flatulent dupes will also produce natural gas without any required input (apart from the obligatory food and oxygen).