International policy and decision makers now recognize that the link between environmental change and migration has grave consequences for human security. The paradigm of security has shifted away from purely state-centered models to a model that encompasses the greater idea of human development as freedom. The new model implies greater international awareness of the importance of sustainable development for all people – including an intact environment and the ability of all people to enjoy good health and respectable work.

Les acteurs politiques et décideurs internationaux reconnaissent à présent que le lien entre changement climatique et migration a de graves conséquences sur la sécurité humaine. Le paradigme sécuritaire s’est déplacé, passant de modèles purement centrés sur l’état à un modèle englobant cette grande idée du développement humain qu’est la liberté.

Aquellos que formulan políticas y decisiones internacionales reconocen que la relación entre el cambio medioambiental y la migración tiene graves consecuencias para la seguridad humana. El paradigma de la seguridad se ha alejado de los modelos centrados exclusivamente en el Estado para acercase a un patrón que contempla una idea más amplia: la del desarrollo humano como modelo de libertad.

In response to changing urban food systems, short supply chains have been advocated to meet urban food needs while building more sustainable urban food systems. Despite an increasing interest in urban food supply and the flows of food from production to consumption, there is a lack of empirical studies and methodologies which systematically analyse the actual proportion and nutritional significance of local and regional food supplied to urban markets.

Human activities have resulted in unprecedented phenomena and severe impacts for the 21st century such as land degradation, natural resources scarcity, climate change, and a rapid decline in biodiversity. These alterations engender secondary effects such as political conflicts, disputes over resources, social disruptions and sudden shocks of catastrophic weather events which are becoming more frequent in critical regions of the world, particularly in drylands; and exacerbate threats for human, national and international security.

The objective and strategy-oriented development goal of Phnom Penh urbanization aim to:

- Orient land usage and ensure the existing potential value of the Phnom Penh capital city in sustainable, efficient and equitable ways, in order to support the socio-economic development, ensure food security, pulchritude and environmental quality.

- Orient the development with equality, equity and correspondence between Phnom Penh capital city, city, provinces of the country and other states’ cities.

This study investigates the process of globalization over the past decades as a process of technological progress in computer science and communication and as transformation in the world economic order. It identifies the political and economic causes of globalization and their impact on the social sphere of developing nations. In past decades social inequality has widened in these countries and their large cities. This article also identifies lifestyle changes in the city of São Paulo and their consequences in urban land occupation and use.

Los gobiernos locales desarrollan una amplia gama de políticas fiscales o regulatorias inspiradas en la idea de que el incremento en el valor de la tierra puede ser utilizado en beneficio de la comunidad, esto es, en la recuperación de plusvalías inmobiliarias. Este trabajo compara las experiencias de recuperación de plusvalías en América del Norte (Estados Unidos y Canadá) y América Latina, discutiendo las razones que han llevado a la utilización de distintas herramientas y los diferentes resultados y grados de éxito obtenidos en su implementación.

Na cidade contemporânea, o ambiente construído vem se modificando, observandose a presença de áreas em transformação de uso e esvaziamento. Em São Paulo, a transformação do ambiente construído mediante esse processo, frente à dinâmica de ocupação do solo e reconfiguração de áreas pela via do mercado imobiliário, parece se consagrar como a principal força de produção do espaço urbano, apesar da existência de instrumentos urbanísticos de indução do desenvolvimento da cidade, articulado pela regulação do poder público municipal.

The short review of the space protection efficiency in European countries and in Serbia has been given. The role of instruments and measures of land policy and corresponding combinations of stimulative and destimulative instruments of economic and fiscal policy, with provision of programming and other support in efficient space protection and reservation in European countries has been investigated.