Conservation subdivisions have emerged as a development option for communities wishing to conserve important ecological features and maintain rural character without decreasing housing density. Yet, these alternatives to conventional subdivisions rarely are used. We used logistic regression models to identify variables that predict county level success at adopting an ordinance and having a conservation subdivision built.

Spatially organized distribution patterns of species and communities are shaped by both autogenic processes (neutral mechanism theory) and exogenous processes (niche theory). In the latter, environmental variables that are themselves spatially organized induce spatial structure in the response variables. The relative importance of these processes has not yet been investigated in urban habitats.

Land is one of the prime natural resources. A city grows not only by population but also by changes in spatial dimensions. Urban population growth and urban sprawl induced land use changes and land transformation. The land transformation is a natural process and cannot be stopped but it can be regulated. Many geographical changes at the urban periphery are associated with the transfer of land from rural to urban purpose. There is an urgent need for fast growing areas like Delhi, which can be easily done by high-resolution remote sensing data.

Today, more than half the world’s population lives in cities. By 2030, it is projected that 6 in 10 people will be urban dwellers. By 2050, the figure will have risen to 6.5 billion people; representing two-thirds of all civilization. Taking into account the increasing rural to urban migration and the rapid growth of cities in the developing world, it is clear that cities face a myriad of problems that may hinder planned growth and development.

• There is an accute lack of well-located urban housing that is adequate, secure, and affordable. The global affordable housing gap is currently estimated at 330 million urban households and is forecast to grow by more than 30 percent to 440 million households, or 1.6. billion people, by 2025.

The New Urban Agenda represents a shared vision for a better and more sustainable future – one in which all people have equal rights and access to the benefits and opportunities that cities can offer, and in which the international community reconsiders the urban systems and physical form of our urban spaces to achieve this.

On this day 9 April 2015, in Seoul, the capital of the Republic of Korea, on the occasion of the ICLEI World Congress 2015, ICLEI Members and representatives of local, subnational governments and our partners worldwide, proclaim the ICLEI Seoul Declaration.

Cities function in an efficient, equitable and sustainable manner only when private and public spaces work in a symbiotic relation to enhance each other. Public space generates equality, however in the past decades it has been drastically been reduced. Inadequate, poorly designed, or privatized public spaces generate exclusion and marginalization.

A defining feature of many of the world’s cities is an outward expansion far beyond formal administrative boundaries, largely propelled by the use of the automobile, poor urban and regional planning and land speculation. A large proportion of cities both from developed and developing countries have high consuming suburban expansion patterns which often extend to even further peripheries. Cities need to accommodate new and thriving urban functions such as transportation routes, etc. as they expand.

Geoffrey Payne outlines five fundamental propositions that are key to his understanding of tenure issues and policy options.

These are:

1) That access to affordable land with adequate security of tenure and associated rights is a pre-condition for realising the goal of adequate housing and poverty reduction;

After natural disasters, governments often relocate vulnerable urban communities in the name of humanitarian relief. But urban communities rarely welcome such relocation, since it frequently exacerbates their daily challenges or creates new risks. Indeed, resettlement after a disaster is often another form of eviction. This briefing discusses the situation in Chennai, where state and local authorities have been building resettlement tenements on inland marsh areas using centrally sponsored schemes for affordable housing.

An estimated 60 per cent of the world’s 17 million refugees currently reside in cities, where they often lack access to financial assistance and legal protection.⁽¹⁾ In their absence, displaced populations depend on participation in formal and, more frequently, informal markets for livelihood generation.