Smoke from agricultural fires ... worsening our air quality with a brownish haze and aggravating allergies. This time of year, farmers south of the border prepare their fields for the growing ...

Smoke from the wildfires ravaging much of the US West Coast has spread to the east of the country, casting a haze over New York and Washington DC. The blazes have burned vast areas of land and ...

sending harmful smoke into the northern United States — an unwelcome reminder of last summer’s historic fire season that also ...

Smoke from three major California wildfires drifted into the Las Vegas Valley, blanketing the region in a haze of unhealthy air Wednesday. As the fires, which were burning in Southern California ...

Thailand to require corn importers to prove non-burning cultivation origins, aiming to reduce PM2.5 cross-border pollution.