Tag Archives: food

Live longer? Save the planet? Better diet could nail both

New study shows healthier food choices could dramatically decrease environmental costs of agriculture


As cities and incomes increase around the world, so does consumption of refined sugars, refined fats, oils and resource- and land-intense agricultural products such as beef. A new study led by University of Minnesota ecologist David Tilman shows how a shift away from this trajectory and toward healthier traditional Mediterranean, pescatarian or vegetarian diets could not only boost human lifespan and quality of life, but also slash greenhouse gas emissions and save habitat for endangered species.

The study, published in the November 12 online edition of Nature by Tilman and graduate student Michael Clark, synthesized data on environmental costs of food production, diet trends, relationships between diet and health, and population growth. Their integrated analysis painted a striking picture of the human and environmental health costs of our current diet trajectory as well as how strategically modifying food choices could reduce not only incidence of type II diabetes, coronary heart disease and other chronic diseases, but global agricultural greenhouse gas emissions and habitat degradation, as well.

“We showed that the same dietary changes that can add about a decade to our lives can also prevent massive environmental damage,” said Tilman, a professor in the University’s College of Biological Sciences and resident fellow at the Institute on the Environment. “In particular, if the world were to adopt variations on three common diets, health would be greatly increased at the same time global greenhouse gas emissions were reduced by an amount equal to the current greenhouse gas emissions of all cars, trucks, planes, trains and ships. In addition, this dietary shift would prevent the destruction of an area of tropical forests and savannas as large as half of the United States.”

The researchers found that, as incomes increased between 1961 and 2009, people consumed more meat protein, empty calories and total calories per person. When these trends were combined with forecasts of population growth and income growth for the coming decades, the study predicted that diets in 2050 would contain fewer servings of fruits and vegetables, but about 60 percent more empty calories and 25 to 50 percent more pork, poultry, beef, dairy and eggs — a suite of changes that would increase incidence of type II diabetes, coronary heart disease and some cancers. Using life-cycle analyses of various food production systems, the study also calculated that, if current trends prevail, these 2050 diets would also lead to an 80 percent increase in global greenhouse gas emissions from food production as well as habitat destruction due to land clearing for agriculture around the world.

The study then compared health impacts of the global omnivorous diet with those reported for traditional Mediterranean, pescatarian and vegetarian diets. Adopting these alternative diets could reduce incidence of type II diabetes by about 25 percent, cancer by about 10 percent and death from heart disease by about 20 percent relative to the omnivore diet. Additionally, the adoption of these or similar alternative diets would prevent most or all of the increased greenhouse gas emissions and habitat destruction that would otherwise be caused by both current diet trends and increased global population.

The authors acknowledged that numerous factors go into diet choice, but also pointed out that the alternative diets already are part of the lives of countless people around the world. Noting that variations on the diets used in the scenario could potentially show even greater benefit, they concluded that “the evaluation and implementation of dietary solutions to the tightly linked diet-environment-health trilemma is a global challenge, and opportunity, of great environmental and public health importance.”

Tilman is a Regents Professor and McKnight Presidential Chair in Ecology in the College of Biological Sciences’ Department of Ecology, Evolution and Behavior and a resident fellow in the University of Minnesota’s Institute on the Environment, which seeks lasting solutions to Earth’s biggest challenges through research, partnerships and leadership development. Clark is currently a doctoral student in the College of Food, Agricultural and Natural Resource Sciences.

Source: University of Minnesota

Imagine a city that thinks about your safety

Can a city be smart? The scientists and technology experts at KAUST certainly think so. They have been working on a number of smart solutions to help deal with issues like traffic congestion, water management, and urban flooding.

Raghid Shreih, a Technology Portfolio Manager at KAUST’s Technology, Transfer and Innovation Division (TTI), works with KAUST researchers to protect, manage and commercialize KAUST’s intellectual property portfolio. He’s been involved with evaluating many of the smart city systems developed at the University.

“The world’s urban population is growing very rapidly,” says Shreih, “and this is presenting a lot of new challenges for cities, particularly in terms of urban planning and infrastructure, public transit, traffic congestion and pollution. As cities become more densely populated, there is also the risk of severe weather incidents causing a lot of damage and casualties. KAUST researchers are developing solutions to address some of these problems.”

KAUST Video:Flood and Traffic Monitoring System

Our latest technology video explains the integrated sensor system for monitoring urban floods and traffic congestions.

One of these solutions is a dual-usage wireless sensor system that tracks traffic congestion and flood incidents in cities. Using a combination of ultrasonic range finders and infrared thermal sensors, the system can monitor traffic flow and roadway flooding, and can be deployed on a large urban scale to provide real-time, highly accurate data on current conditions.

“Because flash floods are extremely rare events, there is not really an incentive to deploy a dedicated infrastructure to address these problems,” said Prof. Christian Claudel, lead inventor of the system. “We wanted to have traffic sensors that would also be capable of detecting flash floods as a secondary application—therefore, the marginal cost of sensing flash floods is zero.”

With storms and floods accounting for nearly 70 percent of the world’s natural disasters, this smart technology can provide up-to-the-minute warnings and allow rapid response to emergency situations. The data collected from these sensors is sent to central servers for assimilation with satellite data, forming real-time maps and forecasting the future path, intensity, and speed of floods and traffic.

This is just one of the many smart systems developed at KAUST.

Shreih says, “The technology being developed at KAUST can be adopted by company and industry partners who will be able to integrate it within their systems and use it to build new infrastructure projects for the cities of the future.”

Source: KAUST