Articles by Lara Whyte
World Health Organization says pollution is increasing and billions worldwide are exposed to dangerous air.
Fans caught in the violence criticise police for their handling of the disorder ahead of Premier League clash.
Death toll rose from an initial 18 dead while 45 people were reported as injured in the attack.
Six young jockeys raced Shetland ponies named after the Queen's winning racehorses to celebrate her birthday.
Relay teams of four raced first-person view drones around an obstacle course in the skies above Sussex.
Hundreds of thousands celebrated the end of the first Workers' Party Congress to be held here in 36 years.
Prince Harry joined by US First Lady Michelle Obama to open the second Invictus Games.
A motorist was rescued by four strangers after her car drove into a river following a collision.
The protesters took to the streets opposing pension and tax reforms ahead of EU meeting.
EXCLUSIVE: Families pay Muslim middle-men to free captives held by IS in Syria.
EXCLUSIVE: Yazidi boy tells of horror of being press-ganged into nightmarish world of Isis child soldiers.