Impacts of reducing air pollutants and CO emissions in urban road transport through 2035 in Chongqing, China.

The road transport sector in megacities is confronted with pressing local air pollution and carbon dioxide (CO) control issues. To determine effective policy instruments for saving energy and the co-control of air pollutants and CO, several mainstream measures were examined and compared in Chongqing's road transport sector from 2017 to 2035. An integration assessment framework was developed by combining the Long-range Energy Alternatives Planning (LEAP) system and a set of quantitative methods for evaluating the co-benefits of emission reductions (including the air pollutant equivalent (AP), co-control coordinate system, and pollutant reduction cross-elasticity (Els)).

[Pollution Characteristics and Source Apportionment of Atmospheric VOCs During Ozone Pollution Period in the Main Urban Area of Chongqing].

In late August 2020, a period of O pollution occurred in the main urban area of Chongqing and lasted for approximately 2 weeks (till early September). Ambient air samples, collected using Summa Canisters and DNPH sampling columns at three observation sites in the main urban area, were used to study the composition, photochemical reaction activity, and source apportionment of volatile organic compounds (VOCs) during the period of O pollution. The results showed that the mean volume fraction of TVOCs in the main urban area of Chongqing during the observation period was 45.