What are "Code Purple" air quality alerts? The Air Quality Index has six color-coded categories, ranging from cleanest to hazardous.

Air quality alerts can change quickly during wildfire smoke events. Here’s what Code Orange, Code Red, Code Purple and Code Maroon mean, and when you should limit time outside.

Climate change means bad air pollution, wildfires, and extreme heat are all happening at once. Here's what to know and how to stay safe.

Early one October afternoon in 2023, thick gray smoke drifted across Sheffield's western skyline. As much of the city became blanketed, residents turned to social media to complain about "bonfire smoke," while others were forced to leave the city due to ...

Air pollution has an alarming effect on global health. In 2019, it was responsible for 4.2 million global deaths. Inhaling air pollution harms health in many different ways beyond simply having effects on the lungs. Over 70% of air pollution deaths are due ...

Everything from candles to gas stoves can create pollution inside homes. Here’s what health experts do to keep their homes healthy. Any flame, whether from a candle or a wood-burning stove, can alter the quality of your indoor air. As an especially ...

I grew up in rural Colorado, deep in the mountains, and I can still remember the first time I visited Denver in the early 2000s. The city sits on the plain, skyscrapers rising and buildings extending far into the distance. Except, as we drove out of the ...

Researchers have transformed air quality data into maps, visualisations and exhibitions to connect people to the issues in tangible ways.

New research from the University of Utah found a correlation between air pollution and preterm births in the state.