With the critical COP25 climate change meeting opening in Madrid, Population Matters' 7m-high Big Baby brought a critical message to Westminster on Friday: cutting population growth through choosing smaller families is vital to fight climate change.

Population Matters' Director, Robin Maynard, summarises events at this month's Nairobi Summit on ICPD25, and recounts his experience of meeting young women and their families in Africa's largest slum and surrounding rural communities.

This week, representatives from Population Matters will attend one of the most significant global meetings on population and development in recent years, the Nairobi Summit on ICPD 25. They will be taking the message that securing sustainable population is an essential goal and that failure to recognise this has led to the promised benefits for people and the environment being delivered too little, too late.

The Scientists’ Warning of a Climate Emergency, signed by more than 11,000 scientists from around the world, warns of “untold human suffering” unless governments take urgent action to tackle the climate crisis, including ending and reversing population growth.

A new study shows that converting all farmland in England and Wales to organic agriculture could increase greenhouse gas emissions because meeting the food demands of the UK population would require using more land abroad.

A new commentary article published in BMJ Sexual & Reproductive Health urges wide-scale adoption of policies that increase the use of modern contraception as part of global efforts to reduce climate emissions.

A continent-wide analysis of how different development factors affect the health of children in Africa found that child health is worst in countries with high population densities.