Sustainable Urban Development Association (SUDA)
            Welcome to SUDA
Welcome to the website of the Sustainable Urban Development Association (SUDA), a charitable corporation devoted to fostering a healthy natural environment by providing information about sustainable city-building. 
Feature Item:  On January 22 2016, SUDA released "Mission Critical: A Rapid Transit Network to End Congestion and Fight Climate Change".  The document proposes significant expansions to the Toronto rapid transit network. To read the report, which has been recently updated, please click here.  
To view SUDA's response to concerns about road congestion at and around Pearson International Airport, please click here.
 Feature Item What to do about Toronto's Gardiner Expressway?  SUDA has suggested in a report released on February 15, 2013 that the entire elevated portion of the expressway can be removed, if new rapid transit alternatives and some road modifications are put into place.  To find out more, click here to read "Transforming Transportation Across the Toronto Waterfront".
 Feature Item:  The 21st century will require that urban expansion be as efficient as possible, with particular attention to urban density, the mixing of uses, and resource consumption.  To read about an example that achieves 100 to 135 residents and jobs per gross hectare without an emphasis on highrise living,  click here.

Your charitable donation to SUDA helps to pay our bills, and generates federal and provincial tax credits for you.  Please donate here.

Our Mission
SUDA's mission is to foster a healthy natural environment by providing information about ways in which cities can become more efficient in land, material, water and energy resources, and highly supportive of sustainable transportation.
We do this by working with stakeholders to increase understanding and acceptance of the importance of sustainable urban development practices; by gathering information and undertaking limited research; and by communicating this information to targeted audiences.

 Sustainable Urban Development

Environmentally sustainable development was defined by the World Commission on Environment and Development as: "Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs."
Achieving sustainable urban communities involves understanding the interconnectedness of economy, society, and environment. A community is unsustainable if it consumes resources faster than they can be renewed, produces more waste than natural systems can safely process, and relies on distant sources for its basic needs.
One of the most important factors in building and maintaining a healthy natural environment -- and therefore our well-being -- is the kind of community in which we live. The physical forms of our cities, towns and neighborhoods, our transportation systems, and the way we use energy, material and water resources have profound effects on environmental sustainability, and on our daily lives.
Today we are facing a number of serious problems linked to unsustainable urban development. For example,

Resources of petroleum, natural gas, and other fossil fuels are in decline, and energy prices are projected to rise rapidly in coming years.

Many of the farm lands that North Americans depend on are being overrun by low-density suburban development.

Severe weather events caused by rapid global warming will threaten the viability of natural ecosystems. Virtually every ecosystem is in decline.

Urban growth continues to add more motor vehicles onto local and regional roads, creating pollution and congestion.

Pollution from transportation, industrial and other urban activities is affecting the lungs and general health people of all ages.

World Scientists' Warning to Humanity
"Human beings and the natural world are on a collision course. Human activities inflict harsh and often irreversible damage on the environment and on critical resources. If not checked, many of our current practices put at serious risk the future that we wish for human society and the plant and animal kingdoms, and may so alter the living world that it will be unable to sustain life in the manner that we know. Fundamental changes are urgent if we are to avoid the collision our present course will bring about. No more than one or a few decades remain before the chance to avert the threats we now confront will be lost and the prospects for humanity immeasurably diminished." -- Issued on November 18, 1992 by the Union of Concerned Scientists, and signed by over 1,500 members of scientific academies worldwide.