45Q - 45Q tax credit
AFOLU - agriculture, forestry, and other land use
ARPA-E - Advanced Research Projects Agency-Energy
ASU - air separation unit
Bbl - barrel of oil
BECCS - bioenergy with carbon capture and sequestration/storage
BTU/mmBTU - British thermal unit/one million British thermal units
C - carbon
CAPEX - capital expenditures
CCS - carbon capture and storage
CCU - carbon capture and utilization
CCUS - carbon capture, utilization, and storage
CDL - cropland data layer
CDR - carbon dioxide removal
CI - carbon intensity
CKD - cement kiln dust
CLT - cross-laminated timber
CO2 - carbon dioxide
CO2eq - CO2 equivalent
CRF - capital recovery factor
CRMS - Coastwide Reference Monitoring System
CSP - concentrated solar power
CWPPRA - Coastal Wetlands Planning, Protection and Restoration Act
DAC - direct air capture
DOE - United States Department of Energy
EIA - United States Energy Information Administration
EJ - exajoule
EOR - enhanced oil recovery
EPA - Environmental Protection Agency
EU - European Union
FOAK/Nth-OAK - first-of-a-kind (FOAK) or nth-of-a-kind
GCCC - Gulf Coast Carbon Center
GHG - greenhouse gas
GIS - geographic information system
Gt - gigatonne
GTM - global timber model
GWP - global warming potential
Ha - hectare
HE - hard-to-avoid emissions
HHV - higher heating value
IAM - integrated assessment model
IEAGHG - International Energy Agency Greenhouse Gas Research and Development Programme
IFM - improved forest management
IPCC - Intergovernmental Panel on Climate Change
ISBL - inside battery limits
ISO - International Standards Organization
J - Joule
kJ - kilojoule
Kt - kilotonne
kW - kilowatt
kWh - kilowatt-hour
LCA - life cycle analysis
LCFS - low-carbon fuel standard
LED - low energy demand scenario
LHV - lower heating value
LR - learning rate
MJ - megajoule
Mt - megatonne ( = 1000 kg)
MW - megawatt
NASEM - National Academies of Science, Engineering, and Medicine
NET - negative emissions technology
OSBL - outside battery limits
PGE - platinum group elements
pH - potential of hydrogen; more precisely, the negative of the log of the hydrogen ion concentration
ppm - parts per million
PSU - practical salinity units
PV - photovoltaics
RCP - representative concentration pathway
RD&D - research, development, and demonstration
SAU - storage assessment unit
SBSTA - Subsidiary Body for Scientific and Technological Advice
SDWA - Safe Drinking Water Act
SLCP - short-lived climate pollutant
SMR - steam methane reformation
SOC - soil organic carbon
SRM - solar radiation management
t - tonne (1000 kg), also sometime mt or metric ton
TEA - techno-economic analysis
TRL - technology readiness level
UN - United Nations
UNEP - United Nations Environment Programme
UNFCCC - United Nations Framework Convention on Climate Change
USDA - United States Department of Agriculture
USGS - United States Geological Survey
WACC - weighted average cost of capital
WBCSD - World Business Council for Sustainable Development
WGSR - water-gas shift reaction
WRI - World Resources Institute
wt - weight
source: J Wilcox, B Kolosz, & J Freeman (2021) CDR Primer