Our enormous thanks to those who have kindly agreed to share photographs and images.
Faith Rose - India deworming in Rajasthan (February 2015).
James Whittington - India, Safe Birth Checklist in Rajasthan (March 2015).
Jenny Matthews - Ghana, education.
Galli Galli Sim Sim - India, early childhood development, education.
World Food Programme - Malawi, stunting reduction, nutrition.
Living Goods - Uganda, reducing under-five mortality.
ACF International - Nigeria, treating Severe Acute Malnutrition.
EGPAF - Zimbabwe, reducing mother to child HIV transmission.
Mana Nutrition - treating Severe Acute Malnutrition.
Gaurav Verma - What Went Wrong?
Climate change definitions are taken from the Guardian's climate change glossary.