data essayJan 10, 2017 How America Changed During Barack Obama’s Presidency Pew Research Center President Michael Dimock examines the changes – some profound, some subtle – that the U.S. experienced during Barack Obama’s presidency.
short readsDec 10, 2015 As smog hangs over Beijing, Chinese cite air pollution as major concern Beijing experienced more than 200 days of air pollution categorized as “unhealthy” or worse in 2014, including 21 days that were “hazardous.”