TY - GENERIC DO - 10.20944/preprints202011.0695.v1 UR - http://dx.doi.org/10.20944/preprints202011.0695.v1 TI - Substantial Decreases in NO2 Pollution Measured by Ground-Based Monitors in US Cities During COVID-19 Shutdowns from Reduced Transportation Volumes T2 - Preprints AU - Heintzelman, Asrah AU - Lulla, Vijay AU - Filippelli, Gabriel PY - 2020 DA - 2020/11/27 PB - Preprints