US & Canada04 May 2013 09:50 GMT
Harmful cookstove smoke is one of the top five threats to public health in poor developing countries.
US naval group holds drills as N Korea ramps up threats
Dozens of Yazidi 'slaves' rescued by Iraqi troops
Saudi Arabia arrests 46 over 2016 Medina mosque attack
White House defends invitation to Philippines' leader
Syria's war explained from the beginning
Philippines leader says N Korea 'wants to end world'
What is happening in Macedonia?
North Korea: The Death of Kim Jong-nam
Turkey threatens more strikes on US-allied Syrian Kurds
Famed Swiss climber falls to death near Mount Everest
by Agnes Poirier
by Dimitar Bechev
by Ann Deslandes
by Andrew Mitrovica
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