Johannesburg's air quality has never really been measured systematically. Like many other cities across the globe, scientists ...

Environmental advocates and public health experts pressed lawmakers Wednesday to support proposals strengthening the state’s network of air quality monitors that can track additional contaminants, ...

Clouds settle low in the sky as dusk sets in across Pajaro Valley. Fields of strawberries stretch out as far as the eye can see, catching the last amber rays of the day. In the distance, the twin ...