Urban ecosystems are carrying an extinction debt. Mitigating this debt will require the development of a predictive framework that improves our understanding of the factors causing decline of native biodiversity in urban areas. I argue that nitrogen is a common currency around which such a predictive framework could be built. I first summarise the evidence that shows the probable extent of nitrogen enrichment in urban ecosystems. I then review the body of empirical evidence that describes how nitrogen enrichment affects ecosystem process and function.

Cities present significant opportunities for new landscape perspectives that can help inform conservation and development decisions. Early in the twenty-first century, the majority of the planet’s population became urban as more people lived in city-regions for the first time in our history. As the global population increases, so does this urbanization. The environmental challenges of population and urban growth are profound. Landscapes represent a synthesis of natural and cultural processes. Cities are certainly cultural phenomena. Historically, cities provided refuge from nature.

When we use the urban metabolism model for urban development, the input in the model is often valuable landscape, being the resource of the development, and output in the form of urban sprawl, as a result of city transformations. The resilience of these “output” areas is low. The lack of resilience is mainly caused by the inflexibility in these areas where existing buildings, infrastructure, and public space cannot be moved when deemed necessary.

Present decisions about urbanization of peri-urban (PU) areas may contribute to the capacity of cities to mitigate future climate change. Comprehensive mitigative responses to PU development should require integration of urban form and food production to realise potential trade-offs. Despite this, few studies examine greenhouse gas (GHG) implications of future urban development combined with impacts on PU food production.

A particular challenge for undertaking urbanization mapping of Beirut is the absence of a unified understanding of the city. Migration, informal settlements, a lack of urban planning, political corruption, as well as internal conflict have made this task even harder. The population in Lebanon is unevenly distributed among regions, where one third of the population resides in the Greater Beirut Area (GBA), whereas it occupies only 233 km2 (2% of Lebanon’s total area). The Greater Beirut Area is subject to pressures arising from population growth and economic expansion.

Urban growth has had unprecedented consequences on environmental sustainability and anthropogenic activity. The eroding coastlines throughout the world are subject to the massive expansion of urban areas and the accountability of sustainable hinterland landscapes. The Golden Horseshoe is Canada’s fastest growing region extending from the Niagara Peninsula and one of the most active economic regions in North America. This paper adopts a combined assessment of land use change and transitions in the coastal stretches of the Greater Golden Horseshoe.

IDMC's report explores the challenges in providing sustainable housing assistance to informal urban settlers displaced by disasters. It looks at nine case studies from Asia, America and Europe.

The report identifies the difficulties faced by urban informal settlers in receiving long-term housing assistance in post-disaster situations. Informal settlers are more exposed and vulnerable to displacement and are more likely to be relocated and excluded from the provision of durable housing assistance.

n recent decades, many cities and towns around the world have seen dramatic population growth, with significant inflows from rural areas. People forcibly displaced by armed conflict, violence or natural disasters have moved to urban areas in search of greater security, better access to basic services and greater economic opportunities.

Displacement continues to rise in the Americas, Asia, Europe and the Middle East. But the good news is that this year’s Global Overview shows a steady decline in IDP numbers in Africa, dating back from 2004. This positive trend gives us hope. Indeed, the African continent remains at the forefront of policy development in support of IDP rights. In 2009, the African Union adopted the Kampala Convention – the first ever instrument for the protection and assistance of IDPs to bind countries across a whole continent.

Women face many problems with regard to land inheritance and land rights in Kenya. Individual and community land ownership do not favour women. The reason for this is that ownership of land is patrilineal, which means that fathers share land amongst sons, while excluding daughters. This practice is traditionally widespread and partly accepted although it goes against the interest of women and is prohibited by the constitution.

O ritmo migratório rural-urbano é frequentemente superior à taxa de crescimento natural dapopulação citadina, em resultado da procura de oportunidades de emprego por parte daspopulações rurais, o que reflecte (e cria novas) pressões sociais e económicas.Ao longo deste texto procura-se compreender os factores que levam as populações de origemrural a migrar para a cidade de Maputo, assim como compreender as dinâmicas de relacionamentodas mesmas, uma vez na cidade, com o seu universo de origem.

Cities and Urban Areas play a crucial role as engines of development as well as centers of connectivity, creativity, innovation, and as service hubs for the surrounding areas. Kenya has experienced unprecedented urban growth. At independence the urban population was about 8%. This had grown to be about 40% by 2015. It is projected that by year 2030 at least half of the Kenyan population will be urbanized. The rapid rate of urbanization exerts increased pressure on authorities to meet the needs of growing urban populations.