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Air Quality Management in the United States
IM240
vehicle emissions test using a dynamometer, which lasts for 240 seconds
IMPROVE
Interagency Monitoring of Protected Visual Environments
IRIS
Integrated Risk Information System
ISTEA
Intermodal Surface Transportation Efficiency Act (1991)
IWG
International Working Group on Environmental Justice
kW
kilowatts
LAER
lowest achievable emissions rate
lb
pounds
LDT
light-duty truck
LDV
light-duty vehicle
LEV
low-emissions vehicle
LPG
liquified petroleum gas
LTER
long-term ecological research
LTM
long-term monitoring
MACT
maximum achievable control technology
MATES
multiple air toxics exposure study
MDN
Mercury Deposition Network
mg/m3
milligrams per cubic meter
μg/m3
micrograms per cubic meter
MOBILE
EPA’s computer program to estimate mobile-source emissions
MPO
Metropolitan Planning Organization
MSA
metropolitan statistical area
MTBE
methyl tert -butyl ether
NAA
nonattainment area
NAAQS
National Ambient Air Quality Standards
NADP
National Atmospheric Deposition Program
NAMS
national air monitoring stations
NAPAP
National Acid Precipitation Assessment Program
NATA
National Air Toxics Assessment
NCLAN
National Crop Loss Assessment Network
NCore
National Core Monitoring Network
NCS
National Children’s Study
NEJAC
National Environmental Justice Advisory Council
NEP
National Estuaries Program
NEPA
National Environmental Policy Act
NERRS
National Estuarine Research Reserve System (NOAA)
NESHAPs
National Emission Standards for Hazardous Air Pollutants
NFS
National Forest System
NHANES
National Health and Nutrition Examination Survey
NHEXAS
National Human Exposure Assessment Survey