Life in San Joaquin valley, the place with the worst air pollution in America

The air quality in this sun-baked California area known as 'America's salad bowl' has been identified as the worst in the US. Residents are concerned, but low wages mean long hours out in the thick of it

Jose Velasquez, weary from picking cherries, was heading home on a battered bike this week with signs of a tough day etched across his face: dust, sunburn and little red marks all over.

And now a reporter is telling the 35-year-old that the World Health Organisation had just identified this baked corner of California as having the country's worst air pollution.