Going, going, gone. You won't find azodicarbonamide in Nature's Own products. And Subway is phasing it out, too. But lots of manufacturers are still using the additive. Meg Vogel/NPR hide caption

itoggle caption Meg Vogel/NPR

Sandwich chain Subway has announced plans to drop the additive azodicarbonamide from its fresh-baked breads. Above, Subway founder Fred DeLuca poses carrying bread for sandwiches. Jonathan Nackstrand /AFP/Getty Images hide caption

itoggle caption Jonathan Nackstrand /AFP/Getty Images

Saudi women get into a taxi outside a shopping mall in Riyadh in 2012. Plans for a subway system in the Saudi capital are likely to provide the biggest benefits to women and the poor. Fayez Nureldine/AFP/Getty Images hide caption

itoggle caption Fayez Nureldine/AFP/Getty Images