NextDecade Corporation engages in development activities related to the liquefaction and sale of liquefied natural gas (LNG) and the capture and storage of carbon dioxide (CO2) emissions. The Company is focusing its development activities on the Rio Grande LNG terminal facility at the Port of Brownsville in southern Texas (the Terminal), a carbon capture and storage project at the Terminal (the Terminal CCS project), and other carbon capture and storage projects (CCS projects) with third-party industrial source facilities. Through its subsidiary, Rio Grande LNG, LLC (Rio Grande), it is developing the Terminal, and it seeks to minimize its associated emissions footprint by developing a CCS project at the Terminal (the Terminal CCS project). Through its subsidiary, NEXT Carbon Solutions, LLC (NEXT Carbon Solutions), the Company seeks to deploy the proprietary carbon capture and storage processes that it has developed at industrial source facilities to reduce CO2 emission levels.