INTERVIEW-UN urban plan needs targets to measure success: environment head
How will the world know if a new global plan to make cities more sustainable over the next 20 years is working?
British companies told 'no excuse for inaction' against slavery
"No company wants the scourge of slavery in its operations and supply chains. We hope the next group (of companies)... will emulate the better practice of the (top performers)"
Bollywood actress apologises after twitter outrage over "refugee" t-shirt cover
Twitter users have accused former Miss World of belittling plight of refugees
Dakar's threatened 'green lung' gets reforestation boost
Planting trees seen as key to protecting capital's shrinking and degraded Mbao forest
London cabbies to be 'eyes and ears' in fight against human trafficking and slavery
There are an estimated 13,000 victims of forced labour, sexual exploitation and domestic servitude in Britain
INSIGHT-Slumscapes: How the world's five biggest slums are shaping their futures
900 million people live in slums - the U.N. says it's time we understood them
City mayors create "global parliament" to manage urbanisation
Mayors say collaboration rather than competition will help them address urgent challenges for the world's cities, from affordable housing and transport to climate change, migration and refugees
Without urgent action, climate change will push millions into hunger - U.N.
The UN estimates that, with climate change, an additional 42 million people will be vulnerable to hunger in 2050
FACTBOX-How the food we eat makes climate change worse
To feed a growing global population, agricultural production must rise by about 60 percent by 2050
EXPERT VIEWS- What are the humanitarian needs in wake of Mosul offensive?
More than 3 million people are already displaced in Iraq as a result of conflicts involving Islamic State