14 December 2015, Science Daily, Vegetarian and ‘healthy’ diets could be more harmful to the environment, researchers say eating lettuce is ‘over three times worse’ in greenhouse gas emissions than eating bacon. Contrary to recent headlines — and a talk by actor Arnold Schwarzenegger at the United Nations Paris Climate Change Conference — eating a vegetarian diet could contribute to climate change. In fact, according to new research from Carnegie Mellon University, following the USDA recommendations to consume more fruits, vegetables, dairy and seafood is more harmful to the environment because those foods have relatively high resource uses and greenhouse gas (GHG) emissions per calorie. Published in Environment Systems and Decisions, the study measured the changes in energy use, blue water footprint and GHG emissions associated with U.S. food consumption patterns. “Eating lettuce is over three times worse in greenhouse gas emissions than eating bacon,” said Paul Fischbeck, professor of social and decisions sciences and engineering and public policy. “Lots of common vegetables require more resources per calorie than you would think. Eggplant, celery and cucumbers look particularly bad when compared to pork or chicken.” Fischbeck, Michelle Tom, a Ph.D. student in civil and environmental engineering, and Chris Hendrickson, the Hamerschlag University Professor of Civil and Environmental Engineering, studied the food supply chain to determine how the obesity epidemic in the U.S. is affecting the environment. Specifically, they examined how growing, processing and transporting food, food sales and service, and household storage and use take a toll on resources in the form of energy use, water use and GHG emissions. On one hand, the results showed that getting our weight under control and eating fewer calories, has a positive effect on the environment and reduces energy use, water use and GHG emissions from the food supply chain by approximately 9 percent. However, eating the recommended “healthier” foods — a mix of fruits, vegetables, dairy and seafood — increased the environmental impact in all three categories: Energy use went up by 38 percent, water use by 10 percent and GHG emissions by 6 percent. Read More here
Tag Archives: consumption
7 December 2015, Huffington Post, Will Climate Change Break the Global Food System? Extreme weather events scuttling harvests. Skyrocketing food prices causing famine for millions and driving multitudes into poverty. Governments toppling – again – in Pakistan and Ukraine. Massive floods driving millions of refugees from their homes in Bangladesh and putting pressure on neighboring India. Droughts devastating harvests in traditional bread baskets like the U.S. and Brazil. The E.U., in a panicked move, suspending its environmental rules for agriculture and instituting a tax on meat. The world’s top greenhouse gas emitters ultimately banding together to raise a global carbon tax.The events described above are not the real world, but they could be. They were part of what transpired at Food Chain Reaction a few weeks ago, a high-level crisis simulation in Washington, DC that brought together 65 international leaders to explore how climate change may strain the world’s food system from 2020 to 2030. What the simulation taught us, is that policymakers attending this week’s U.N. climate summit in Paris cannot afford to neglect food security. The world’s population is on a path to 9.5 billion by mid-century. That means we will have to grow up to 70 percent more food. To make matters more complicated, we’ll have to do so in a changing climate that alters the very way we grow our crops. We must figure out how we can make that happen within the limits of the Earth’s natural resources. We’ve talked long enough. It is time to decide on a course of action that will actually improve the situation. Read more here
1 December 2015, The Conversation, When climate change hits our food supply, city foodbowls could come to the rescue. Australians may need to get used to coping with more disruptions to their food supply and rising food prices in a warming climate. But the food produced near our cities – our “city foodbowls” – could play a vital role in increasing the resilience of our food supply, as discussed in a new briefing from our Foodprint Melbourne project. The urban fringes of Australia’s major cities are some of the most productive agricultural regions in Australia. They also have access to valuable urban waste streams to support food production, including recycled water from city water treatment plants and desalination plants. Nonetheless, Australia’s city foodbowls are at risk of urban development, and the opportunity to develop them as climate resilient foodbowls could be lost unless their value is recognised in metropolitan planning policy. Climate shock The Queensland floods of 2010-11 showed how a sudden extreme weather event could disrupt a city’s food supply. Major transport routes to Brisbane and other cities were cut off and supermarkets began to run short of some food. And the Millennium Drought demonstrated the impact that drought could have on food prices, when fruit prices in Australia increased 43% between 2005 and 2007, and vegetable prices by around 33%. Climate change is expected to reduce the capacity for food production across southern Australia due to water scarcity, increasing temperatures and more frequent extreme weather events. Read More here
30 November 2015 The Conversation, We can achieve sustainability – but not without limiting growth. Can Australians be sustainable and enjoy endless economic growth? It’s not likely. In a recent article on The Conversation, Steve Hatfield-Dodds argued that sustainability was possible in Australia without sacrificing economic growth. He also argued the necessary policy changes would not require fundamental changes to Australians’ values. This research was based on a detailed paper in Nature and modelling undertaken for CSIRO’s recent National Outlook Report. Contrary to this pro-growth outlook, I will argue that sustainability would be almost impossible to achieve in practice without ending growth in population and consumption per person. I’ll also argue that the claim that we don’t need to change our values cannot be proven (or disproven) by the method used by Hatfield-Dodds and colleagues. Recent experience suggests we may need to change our values. This debate is important, because the argument that sustainability is compatible with growth is likely to be misused by those who have vested interests in endless economic growth. Growth and sustainability are rarely compatible. Read More here