A/CONF.171/13 English Page 11 for greater investment in people, and for a new action agenda for the empowerment of women to ensure their full participation at all levels in the social, economic and political lives of their communities. 1.8. Over the past 20 years, many parts of the world have undergone remarkable demographic, social, economic, environmental and political change. Many countries have made substantial progress in expanding access to reproductive health care and lowering birth rates, as well as in lowering death rates and raising education and income levels, including the educational and economic status of women. While the advances of the past two decades in areas such as increased use of contraception, decreased maternal mortality, implemented sustainable development plans and projects and enhanced educational programmes provide a basis for optimism about successful implementation of the present Programme of Action, much remains to be accomplished. The world as a whole has changed in ways that create important new opportunities for addressing population and development issues. Among the most significant are the major shifts in attitude among the world’s people and their leaders in regard to reproductive health, family planning and population growth, resulting, inter alia, in the new comprehensive concept of reproductive health, including family planning and sexual health, as defined in the present Programme of Action. A particularly encouraging trend has been the strengthening of political commitment to population-related policies and family-planning programmes by many Governments. In this regard, sustained economic growth in the context of sustainable development will enhance the ability of countries to meet the pressures of expected population growth; will facilitate the demographic transition in countries where there is an imbalance between demographic rates and social, economic and environmental goals; and will permit the balance and integration of the population dimension into other developmentrelated policies. 1.9. The population and development objectives and actions of the present Programme of Action will collectively address the critical challenges and interrelationships between population and sustained economic growth in the context of sustainable development. In order to do so, adequate mobilization of resources at the national and international levels will be required as well as new and additional resources to the developing countries from all available funding mechanisms, including multilateral, bilateral and private sources. Financial resources are also required to strengthen the capacity of national, regional, subregional and international institutions to implement this Programme of Action. 1.10. The two decades ahead are likely to produce a further shift of rural populations to urban areas as well as continued high levels of migration between countries. These migrations are an important part of the economic transformations occurring around the world, and they present serious new challenges. Therefore, these issues must be addressed with more emphasis within population and development policies. By the year 2015, nearly 56 per cent of the global population is expected to live in urban areas, compared to under 45 per cent in 1994. The most rapid rates of urbanization will occur in the developing countries. The urban population of the developing regions was just 26 per cent in 1975, but is projected to rise to 50 per cent by 2015. This change will place enormous strain on existing social services and /...