Americas Archives | Research & Innovation

Professor Rod MacRae co-authors study that finds organic farms are more energy efficient

fmaquito — Tue, 12 Apr 2011 08:00:00 +0000

Organic farms can be more energy efficient than conventional farms that mass produce crops using unsustainable practices, a surprising result from a study co-authored by a 91��ɫ professor.

Researchers analyzed 130 studies to compare the energy use and global warming potential of organic versus conventional farming. They concluded that organic farms were more energy efficient on both a per-hectare and per-product basis, with the exception of fruit farming and poultry production, where data is limited.

“These findings shake up the concept that ‘bigger’ is always better. Higher crop yields, bigger equipment, less genetic diversity, and more fertilizer and pesticides do not equal a more energy-efficient operation,” says Rod MacRae (left), a professor in 91��ɫ’s Faculty of Environmental Studies.

Critics of organic farming commonly argue that lower yields make it unsustainable in the long term. “As population increases and land availability decreases, it’s assumed that an ‘assembly line’ approach to agriculture is the only way to keep up with our food needs. While this is the dominant way of thinking, this logic is also deeply flawed,” MacRae says. “For example, many regions in the global south show better yield performance with organic farming. Even in North America, organic yields are not far behind conventional ones.”

MacRae points out that there is an enormous amount of waste in conventional systems. Significant amounts of edible food are lost at harvest, during processing and distribution, at retail and in consumers’ homes. “By some accounts, up to 40 per cent of what gets farmed never makes it to our mouths, and this adds enormously to energy waste. This can result in the perception that we’re not producing enough food,” he says.

Studies of conventional and organic grain growers in the prairie region showed significant benefits for organic methods, including 50 per cent lower energy use in a 12-year study of forage and grain crop rotations. The absence of nitrogen fertilizer was a main contributor to reduced energy inputs and greater efficiency. Modelling studies of a Canada-wide conversion to organic canola, wheat, soybean and corn concluded we would consume 39 per cent less energy and generate only 77 per cent of the global warming emissions and 17 per cent of ozone-depleting emissions of conventional wheat farming.

Above: Organic cultivation of mixed vegetables

In terms of dairy farming, a study in Atlantic Canada found that an organic, seasonal grazing system was 64 per cent more energy efficient and emitted 29 per cent less greenhouse gases compared with the average of conventional systems. Cows consuming an organic diet may also have a longer lifespan, increasing efficiency and reducing methane emissions when calculated over time.

Where livestock is concerned, fewer studies exist and comparisons are more difficult because of dramatic differences in operations from farm to farm, particularly for hogs and poultry. Conventionally raised beef is widely accepted as the least environmentally friendly meat, requiring seven times as many inputs for an equivalent output of calories. Organic beef production is considered to be more efficient because the animals consume more grass and less grain than humans can consume.

The study, “The Carbon and Global Warming Potential Impacts of Organic Farming: Does It Have a Significant Role in an Energy Constrained World?” was published in the journal Sustainability. Its lead author is Professor Derek Lynch, Department of Plant & Animal Sciences, Nova Scotia Agricultural College.

MacRae was also interviewed in about the lack of attention politicians are paying to food policy during the current federal election campaigns.

“None of them really link the food story to health care that well, or to social-policy reform,” said Rod MacRae, a professor at 91��ɫ who is one of Canada’s foremost experts on the subject. “What they’ve done is pick the low-hanging fruit – the things that are more part of the public consciousness right now.”

Still, strong federal leadership in the national food policy process is critical, he said. “The federal role is to act as the animator, the facilitator, and to use its usual package of sticks and carrots to try and get everybody on board.”

By Melissa Hughes, media relations officer.

Republished courtesy of YFile– 91��ɫ’s daily e-bulletin.

The post Professor Rod MacRae co-authors study that finds organic farms are more energy efficient appeared first on Research & Innovation.

Researcher and City Institute director shifts the lens to suburbs around the globe

fmaquito — Tue, 18 May 2010 08:00:00 +0000

The suburbs have often been dismissed as cultureless wastelands of cookie-cutter housing and strip malls. But 91��ɫ environmental studies Professor Roger Keil, principal investigator of a major international research initiative, says there’s a lot more happening in suburbia than people think and researchers have ignored it for far too long. Most urban growth these days is suburban development and yet, until now, there has not been an encompassing study of suburbs around the world which examines their challenges and commonalities.

“The suburbs have not received a lot of attention, so we’re trying to shift the lens, so to speak,” says Keil, director of the City Institute at 91��ɫ (CITY). “Urbanization is at the core of the growth and crisis of the global economy today. Yet, the crucial aspect of 21st-century urban development is suburbanization, which is defined as the combination of an increase in non-central city population and economic activity, as well as urban spatial expansion.”

Left: Suburbs being built in 91��ɫ Region. Photo by Roger Keil.

With $2.5 million in research funding through the Social Sciences & Humanities Research Council of Canada’s program, Keil, along with some 43 researchers from around the globe, will study various aspects of what he likes to call the in-between city. Global Suburbanisms: Governance, Land and Infrastructure in the 21st Century is “the first major research project that takes stock of worldwide suburban developments in a systematic way. By studying suburbs, we analyze recent forms of urbanization and emerging forms of urbanism across the world, but we also take into view the dilemmas of aging suburbanity,” he says. Canadian suburbanization and suburbanism trends will serve as a critical basis for understanding suburbanization in the Americas, Europe, Africa and Asia.

What makes suburbs so important to study is their abundant growth. In the 1800s, only about two per cent of the world’s population was urbanized. That increased to about 10 per cent in the 1900s and to almost 50 per cent in the early 2000s. The suburbs are changing and growing, and, in North America at least, they are becoming the place to be. “It’s a percentage increase but also a real increase because the world population has risen dramatically,” says Keil. “More and more people don’t live in dense urban centres anymore, they live in suburbs. So now we call it suburbanization instead of urbanization.” Canada is one of the most highly urbanized countries in the world and that includes the suburbs. When people immigrate to Canada, they often move straight to the suburbs, places like Brampton and Markham, bypassing cities like Toronto altogether.

Right: Roger Keil

The question then becomes, “When we see a suburb, how do we understand it? We want to create a different way of looking at things,” says Keil. “We also hope in the process…this information becomes useful to users of suburban spaces, where they consume and produce, as well as to developers.”

By examining the governance of suburbanization, researchers will get a better idea of how development is guided and regulated, and how state, market and civil society actors are involved. The seven-year project is comprised of many smaller studies of two to four years in length. The two prime anchors will be land – housing, shelter systems, real estate, greenbelts and megaprojects – and infrastructure, including transportation, water and social services.

Keil’s own keen interest is in greenbelts and the relationships between natural and social, urban and suburban. How, for instance, does water fit in? Where does it come from, a pipe, a lake, a well? What is the relationship of suburbanization to water? How is it used? “We need to develop alternatives and this is particularly true in environmental metabolism of waste disposal, water, smog. The energy use has increased…the environmental bads growing out of suburbs have outpaced suburbanization,” he says. “We all live in one environmental global space.” There is a need to understand that interconnectivity.

Left: Suburb of Kuisebmond in Namibia, Africa. Photo by Roger Keil.

In the process of studying suburbanization, researchers will be up against the traditional biases and ingrained way people think about the areas surrounding the city core, often as urban sprawl. “We need to break down and expand the way people look at the suburbs,” says Keil. There is not just one type of suburban development. There are the squatter settlements in Africa and Latin America, the expanding outskirts of India and China, the peripheral high-rise developments in Europe and Canada, and North America’s gated communities. With the different types of development come different social and cultural norms, land-use patterns and forms of transportation. “Through one lens we say these are all suburbanizations.” Until now, there has been “no serious attempt to bring all these phenomena together.”

This project will look at the differences between central cities and suburbs, as well as the diversity of suburban development. “Suburbs are very diverse ethnically, culturally and lifestyle-wise and the gender roles are not as traditional as 'Leave it to Beaver' may have led us to believe.” People around the world have negotiated the suburban realm in a variety of different ways.

New forms of suburbanization are being created all the time. There are copycat North American suburbs in Calcutta, for instance. Keil expects that suburbs around the world have different trajectories of where they’re going and he hopes that they can learn from one another. As it turns out, all cities and suburbs are not looking like Los Angeles or Chicago, as once thought. “We’re turning that upside down,” says Keil. “Conceptually, we want to rewrite the books. The suburbs can all be understood under a number of guidelines we want to develop. So there is a common lens we can look through despite the large variety of forms we see.”

In addition to the various studies, classes, workshops and conferences will held around the world. There will be a travelling multimedia exhibition at the end, a book series and a series of documentaries produced in collaboration with the National Film Board of Canada. 91��ɫ’s Knowledge Mobilization Unit will connect the research with policy-makers and community organizations over the span of the project.

Through this project, the suburbs may finally get a little respect.

For more information, visit the CITY Web site.

By Sandra McLean, YFile writer

Republished courtesy of YFile– 91��ɫ’s daily e-bulletin.

The post Researcher and City Institute director shifts the lens to suburbs around the globe appeared first on Research & Innovation.