Delhi's air quality is facing a new challenge as ground-level ozone, once a summer concern, is now a year-round pollutant. Data reveals ozone dominated the daily Air Quality Index for significant ...

We went to Nigeria, where recycling plants are extracting lead for use in American and European car batteries — at a terrible human cost. By Katrin Bennhold I’m the host of The World. A lot of ...

Lead exposure is one of the most urgent yet overlooked development challenges of our time. It affects millions of people worldwide — especially children — causing irreversible health damage and ...