Around the world many girls leave school before completing their education. It's said that those who stay to the end of high school have more agency and choice, but also earn more money and have fewer and healthier children. Tom Heap hears how education and access to family planning don't just impact family size, it can also propel young women into positions of leadership where they can help their communities adjust to climate change. Dr Tamsin Edwards of King's College, London helps Tom calculate just how useful secondary education for girls can be in the fight against climate change. Producer: Anne-Marie Bullock Series made in partnership with the Royal Geographical Society