Decades of air quality improvements have substantially reduced the motor vehicle
emissions of volatile organic compounds (VOCs). Today, volatile chemical products (VCPs) …

Proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS) is a technique
commonly used to measure ambient volatile organic compounds (VOCs) in urban, rural, and …

In situ measurements have suggested vehicle emissions may dominate agricultural sources
of NH3 in many cities, which is alarming given the potential for urban NH3 to significantly …

The National Emission Inventory (NEI) of the US Environmental Protection Agency (EPA)
reports a steady decrease of US NOx emissions over the 2005–2017 period at a rate of 0.1 …

Air pollution disproportionately burdens communities of color and lower‐income
communities in US cities. We have generally lacked city‐wide concentration measurements …

Houston, Texas is a major US urban and industrial area where poor air quality is unevenly
distributed and a disproportionate share is located in low-income, non-white, and Hispanic …

A new configuration of the Community Earth System Model (CESM)/Community Atmosphere
Model with full chemistry (CAM‐chem) supporting the capability of horizontal mesh …

Nitrogen oxides (NO x) are a key precursor in O3 formation. Although stringent
anthropogenic NO x emission controls have been implemented since the early 2000s in the …

The impact of reducing industrial emissions of volatile organic compounds (VOCs) on ozone
(O 3) pollution is of wide concern particularly in highly industrialized megacities. In this …

The COVID-19 pandemic and ensuing lockdown of many US States resulted in rapid
changes to motor vehicle traffic and their associated emissions. This presents a challenge …