The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

Delhi's pollution levels remain high with PM10 and PM2.5 concentrations increasing in recent years. Despite government ...

Cornwall has made the top ten places in the world to stargaze with searches to witness phenomenon such as the northern lights ...

Dhaka, the overcrowded capital city of Bangladesh, has topped the list of cities with the worst air quality with an AQI index of 257 at 9:31am today (25 January). The air was classified as 'very ...