Nature World: As California smog worsens as a result of extreme heat and drought, health risks increase for the state's residents, new reports say.
Over the last year, smog has blanketed Californian skies, stalling decades of progress towards cleaner air. And while many are anticipating a rainy and windy storm will soon clear away the dirty air, they may find their prayers unanswered as high-pressure systems have resulted in fewer storms, less circulation and unusually stagnant air.
"There's a steady trend...