**Preface to "Geological and Mineralogical Sequestration of CO2"**

The rapid increasing of concentrations of anthropologically generated greenhouse gases (primarily CO2) in the atmosphere is responsible for global warming and ocean acidification. Carbon capture and storage (CCS) techniques have been proposed and developed to mitigate the rise of CO2 in the atmosphere. One of the technological solutions is the long-term storage of CO2 in appropriate geological formations, such as deep saline formations and depleted oil and gas reservoirs. A potential alternative to geological CO2 storage is CO2 mineral sequestration through carbonation (ex situ and in situ), leading to the permanent and safe storage of CO2. This Special Issue collects articles covering various aspects of recent scientific advances in the geological and mineralogical sequestration of CO2. In particular, it includes the assessment of the storage potential of candidate injection sites, numerical modelling of geochemical–mineralogical reactions aimed at predicting CO2 leakage, studies of natural analogues, and experimental investigations of carbonation processes.

> **Giovanni Ruggieri, Fabrizio Gherardi** *Editors*
