As Indian metro cities continue to battle alarming pollution levels, Greenpeace’s analysis of NO2 satellite data re-asserts that transport and industrial clusters are giving rise to the country’s worst Nitrogen Oxide (NOx) hotspots.

Several provincial-level regions on Monday started implementing the "China VI" vehicle emission standards ahead of schedule to ramp up efforts against a major source of air pollution.

Remote sensing is one technique used to measure real-world NOx emissions in Europe. Remote sensing measurements conducted by the Canton of Zurich are unique in terms of how consistently they have been collected since 2000 and the steep road grade at the main remote sensing monitoring site.

For this study, a C-segment passenger vehicle, equipped with a gasoline direct injection engine and compliant with the Euro 6c standard, was tested on the chassis dynamometer over the regulatory NEDC and WLTC cycles, and over two RDE-like cycles. The tests were performed at different ambient conditions and with both cold and warm engines.

Globally, the estimates suggest that there are 170 new cases of traffic pollution-related asthma per 100,000 children every year, and 13% of childhood asthma cases diagnosed each year are linked to traffic pollution. The country with the highest proportion of traffic pollution-attributable childhood asthma incidence was South Korea (31%), the UK ranked 24th out of 194 countries, the US 25th, China 19th, and India 58th.

On Monday, London Mayor Sadiq Khan unveiled the world’s first 24-hour Ultra Low Emission Zone boasting the world’s toughest vehicle emissions standards in an effort to help reduce toxic air polluti

The study found that teens in place with higher levels of nitrogen oxides, which come from diesel vehicles, were most at risk. Photograph: Jinny Goodman/Alamy

As air quality improves, the invisible chemistry happening in the air around us is changing.

Cities of low and middle-income countries face severe challenges in managing the increasing amount of waste produced, especially the organic fraction.

Coarse particulate matter with aerodynamic diameter between 2.5 and 10μm (PM2.5–10) air pollution is a severe environmental problem in developing countries, but its challenges to public health were rarely evaluated. The researchers aimed to investigate the associations between day-to-day changes in PM2.5–10 and cause-specific mort

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