Paris and London amongst the cities facing sanctions if no improvement in health measures. Sara Firth’s report from London. Subscribe: https://www.youtube.com/channel/UC7fWeaHhqgM4Ry-RMpM2YYw?sub_confirmation=1 Livestream: http://www.youtube.com/c/trtworld/live Facebook: https://www. FACEBOOK /TRTWorld Twitter: twitter: #TRTWorld Visit our website: http://www.trtworld.com/ Environmental Pollution and Control Measures – Air Pollution. In this lesson Shreyaa Sharma explains the air pollution , sources , effects