Greece must stop locking up child migrants, charity warns ahead of pope's visit
At least 1,500 unaccompanied migrant and refugee children stranded in Greece have nowhere safe to stay
Latest battle to wipe out polio begins with vast vaccine switch
Full, official, global eradication could be declared by the end of this decade, experts say
Families in the fields as annual Afghan poppy harvest begins
"I have 20 members in my family, I have to feed them. We are poor people" - Afghan poppy farmer Haji Janan, 60
UN panel to study tough 1.5C limit on global warming
IPCC chair says there are "serious risks" with even minor rises in temperatures from current levels
Mental health care in emergencies 'not an optional luxury' - experts
"The problem with mental health is it's often invisible because it's not measured, so people may not think it's important"
Better mental health treatment would boost nations' economies - WHO
Each dollar spent on better treatment of anxiety and depression yields return of $4 in better health and ability to work - WHO
Bulgarian man arrested for vigilante action on migrants
The man who filmed himself tying up three migrants was initially praised by Bulgaria's prime minister
Greece expects first asylum decisions under EU deal in two weeks
Asylum applications piling up since March, when EU and Turkey signed agreement to close off the main route into Europe