It's tricky to say definitively which volcano is the *most* active in the world, as there are different ways to define "activity."

Here's a breakdown:

By frequency of eruptions:

* Kilauea in Hawaii is a strong contender. It has been erupting almost continuously since 1983, with periods of heightened activity and lava flows.

* Stromboli in Italy is another highly active volcano known for its frequent, often small eruptions.

By volume of material erupted:

* Mount Etna in Italy often erupts with large volumes of lava and ash, making it a strong contender for the title based on the sheer amount of material ejected.

By overall impact:

* Volcanoes in the Ring of Fire (a zone of intense seismic and volcanic activity around the Pacific Ocean) are responsible for many large, impactful eruptions.

Ultimately, there isn't a single "most active" volcano. Different criteria lead to different answers.