Among the regions, the population of Europe is projected to peak around 2025 at 0.74 billion and decline thereafter. The pace of growth poses enormous challenges for many of the poorest countries, which lack the resources not only to keep up with demand for infrastructure, basic health and education services and job opportunities for the rising number of young people, but also to adapc to climate change.” These services must be based on and reinforce human rights and should include sexuality education for young people, particularly adolescent girls.