Renewable resource

Renewable Resources are resources that can be recreated indefinitely (as opposed to nonrenewable resources). While running out of resources isn't likely to be a factor due to theoretically infinite (and still quite vast in practice) map generation, this is a list of resources that can produced over and over without having to explore for more.

The listed Fully Renewable Products are items which can be crafted or smelted using only renewable resources. Note that TNT and arrows are created from a combination of renewable and non-renewable resources (being Sand and Flint, respectively).

Fully renewable resources
These resources do not require any nonrenewable items in order to be collected.

Renewable, but require nonrenewable resources
These resources require a one-time craft of a nonrenewable item in order to be collected. The resource then can be collected infinite times.

Renewable, but cannot be renewably harvested
These "resources" can be made infinitely, but cannot be renewably harvested and carried.

Note that you can duplicate sand and gravel using sticky pistons, but this is a bug and likely to be fixed soon.