Artists shine light on human trafficking in Delhi exhibition
Exhibition in New Delhi highlighting the plight of human trafficking victims around the world
Portraits from the camps: Life as a refugee child
Award-winning photographer's new series of images depicting what it’s really like to be a refugee child
Hydropower
Hydropower is a source of clean, renewable energy - but can it stand up to the more erratic rainfall climate change produces? And what happens to people in the path of large dam projects?
Ukraine crisis in photos
Selection of photos from the Ukraine crisis as leaders of France and Germany work towards peace deal following rebel advance in recent weeks that scuppered five-month-old ceasefire
Wind energy
The use of wind energy is growing around the world as countries look for new, clean sources of energy and try to cut their climate-changing emissions