https://grist.org/science/in-china-coal-pollution-kills-someone-every-21-seconds/
In China, coal pollution kills someone every 21 seconds | Grist
Aug 14, 2015 - A new study reveals that 4,000 people die every day from smog in the world's most populous nation.
in chinacoal pollution21 secondskillssomeone
https://www.paralympic.org/news/richard-browne-targets-sub-21-seconds-200m-after-world-record-win
Richard Browne targets sub 21 seconds for 200m after world record win
Despite his success, US sprinter says he would swap both his world records for world titles in 2015.
richard browne21 seconds
https://www.wionews.com/trending/a-united-flight-plunged-for-21-seconds-before-climbing-steeply-to-resume-normal-flight-561704
Near-crash: United flight plunged towards ocean for 21 seconds, 800 feet away from water before...