What is the prefix for natural?

There isn't a single, universally accepted prefix for "natural". However, depending on the context, several prefixes can be used to convey a similar meaning. Here are a few options:

* Nat-: This is a common prefix used in scientific terms, such as "natural gas" and "natural history".

* Nature-: This prefix is used in words like "nature-based" or "nature-friendly".

* Bio-: This prefix is used in words like "biodiversity" and "biotechnology" and often indicates a connection to living organisms.

* Eco-: This prefix is used in words like "ecosystem" and "eco-friendly" and often indicates a connection to the environment.

The best prefix to use will depend on the specific context and the desired meaning.