News / Science & Technology

    Global Diets Affect Climate

    In this undated handout photo provided by ITTO (International Tropical Timber Organization) website, a man is seen standing in a clearing in tropical forest  in an unknown location in Cameroon, Africa.  Large swaths of the world's tropical forests have been officially shielded from deforestation, but an international organization says that may not be enough.
    In this undated handout photo provided by ITTO (International Tropical Timber Organization) website, a man is seen standing in a clearing in tropical forest in an unknown location in Cameroon, Africa. Large swaths of the world's tropical forests have been officially shielded from deforestation, but an international organization says that may not be enough.

    Multimedia

    Audio
    Joe DeCapua

    A new study says the growing popularity of the Western diet could help worsen climate change. As more people make meat a principle part of their diet, the authors say it will be very difficult to reduce greenhouse gas emissions.

    Listen to De Capua report on diet and climate change
    Listen to De Capua report on diet and climate changei
    || 0:00:00
    ...    
     
    X

    The global population is forecast to grow to over nine billion by 2050. And as the population rises, so does the need for more food.  The demand for meat is rising especially fast in many of the world’s emerging economies. The Western diet has become fashionable there.

    Many studies have warned that the Western diet – filed with fat, sugar and salt – is triggering more non-communicable diseases -- diabetes, cardiovascular disease, cancer and obesity. But the new study published in Nature Climate Change considers the health of the planet, not just the body.

    Co-author Chris Gilligan, professor of mathematical biology at the University of Cambridge, said much of the study focuses on how greater food production will affect land use.

    “Well, that’s going to be one of the major problems as we go forward. That has knock-on consequences then on conservation, on biodiversity, but also on use of land for other purposes. For organization, for example, for energy supply and how we manage water. How do we find enough land to produce the crops for crop growth – the crops that are then used to feed animals and also regions for rearing the animals?”

    The study said using more land for food production carries a “high price.” Deforestation, for example, would result in greater carbon emissions.

    “First of all, we think about where is that new land for agriculture going to come from? And a lot of it is going to come from pristine forests. So as you remove those forests, you’re removing trees which are very important traps for carbon dioxide. And in deforestation there’s an increase in greenhouse gas emissions,” he said.

    Gilligan said greater food production also will result in more methane being released into the atmosphere.

    “Increasing livestock production also involves a large amount of greenhouse gas production from the animals themselves.”

    Methane would also be released through the use of manure as fertilizer. The study says increased deforestation, fertilizer use and methane from livestock “are likely to cause greenhouse gas emissions from food production to increase by nearly 80-percent.”

    Gilligan said that what people choose to eat is a major driver behind greenhouse gas emissions.

    “For many people meat does taste exciting. It tastes different. [You] can do lots of things with it in a culinary way, as one can with vegetables, of course. But nevertheless there is an attraction there – an attraction in saying, well, yes, I eat a lot more meat than I used to.”

    The study also said that “food production is a main driver of biodiversity loss…and pollution.”

    The Cambridge professor added that reducing greenhouse gas emissions could involve persuading people to eat differently – but adds it won’t be easy.

    “There may be economic means by which this is done, for example, through a carbon tax. But that’s a punitive measure and may perhaps be necessary. More preferable, however, is the notion of the nudge approach to behavior. So, how do you make it attractive for people to change their dietary behavior? That is about publicity about the health advantages and hoping that that really induces people to change what they do,” he said.

    Reducing waste during food production, he said, would go a long way toward lowering pollution.

    “There’s a huge amount of loss of material through waste in developing countries pre-harvest – and in developed countries, sadly, post-harvest. Were we able to move to a reduction in, for example, waste, that could have a significant reduction in the amount of greenhouse gas emission,” he said.

    The U.N. Environment Program estimated one-third of the food produced for human consumption every year gets lost or wasted. That’s about 1.3 billion tons of food that nobody gets to eat. The UNEP reported in the U.S. alone 30 percent of all food is thrown away.

    The study goes on to say the Western diet is characterized by an “excessive consumption of food.” Researchers came up with -- what they call -- an “average” balanced diet that would reduce pressure on the environment. It includes “two 85-gram portions of red meat and five eggs per week”, along with a daily portion of poultry.

    They said it’s not about being vegetarian. It’s about eating sensibly, while protecting the environment. 

    You May Like

    Escalation of Media Crackdown in Turkey Heightens Concerns

    Critics see 'a new dark age' as arrests of journalists, closures of media outlets by Erdogan government mount

    Russia Boasts of Troop Buildup on Flank, Draws Flak

    Russian military moves counter to efforts to de-escalate tensions, State Department says

    What Take-out Food Reveals About American History

    From fast-food restaurants to pizza delivery, here's what the history of take-out food tells us about changes in American society

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Immigrant Delegate Marvels at Democratic Processi
    X
    Katherine Gypson
    July 27, 2016 6:21 PM
    It’s been a bitter and divisive election season – but first time Indian-American delegate Dr. Shashi Gupta headed to the Democratic National Convention with a sense of hope. VOA’s Katherine Gypson followed this immigrant with the love of U.S. politics all the way to Philadelphia.
    Video

    Video Immigrant Delegate Marvels at Democratic Process

    It’s been a bitter and divisive election season – but first time Indian-American delegate Dr. Shashi Gupta headed to the Democratic National Convention with a sense of hope. VOA’s Katherine Gypson followed this immigrant with the love of U.S. politics all the way to Philadelphia.
    Video

    Video A Life of Fighting Back: Hillary Clinton Shatters Glass Ceiling

    Hillary Clinton made history Thursday, overcoming personal and political setbacks to become the first woman to win the presidential nomination of a major U.S. political party. If she wins in November, she will go from “first lady” to U.S. Senator from New York, to Secretary of State, to “Madam President.” Polls show Clinton is both beloved and despised. White House Correspondent Cindy Saine takes a look at the life of the woman both supporters and detractors agree is a fighter for the ages.
    Video

    Video Dutch Entrepreneurs Turn Rainwater Into Beer

    June has been recorded as one of the wettest months in more than a century in many parts of Europe. To a group of entrepreneurs in Amsterdam the rain came as a blessing, as they used the extra water to brew beer. Serginho Roosblad has more to the story.
    Video

    Video First Time Delegate’s First Day Frustrations

    With thousands of people filling the streets of Philadelphia, Pennsylvania for the 2016 Democratic National Convention, VOA’s Kane Farabaugh narrowed in on one delegate as she made her first trip to a national party convention. It was a day that was anything but routine for this United States military veteran.
    Video

    Video Commerce Thrives on US-Mexico Border

    At the Democratic Convention in Philadelphia this week, the party’s presumptive presidential nominee, Hillary Clinton, is expected to attack proposals made by her opponent, Republican presidential nominee Donald Trump, to build a wall along the U.S.-Mexico border. Last Friday, President Barack Obama hosted his Mexican counterpart, President Enrique Peña Nieto, to underscore the good relations between the two countries. VOA’s Greg Flakus reports from Tucson.
    Video

    Video Film Helps Save Ethiopian Children Thought to be Cursed

    'Omo Child' looks at effort of African man to stop killings of ‘mingi’ children
    Video

    Video London’s Financial Crown at Risk as Rivals Eye Brexit Opportunities

    By most measures, London rivals New York as the only true global financial center. But Britain’s vote to leave the European Union – so-called ‘Brexit’ – means the city could lose its right to sell services tariff-free across the bloc, risking its position as Europe’s financial headquarters. Already some banks have said they may shift operations to the mainland. Henry Ridgwell reports from London.
    Video

    Video Recycling Lifeline for Lebanon’s Last Glassblowers

    In a small Lebanese coastal town, one family is preserving a craft that stretches back millennia. The art of glass blowing was developed by Phoenicians in the region, and the Khalifehs say they are the only ones keeping the skill alive in Lebanon. But despite teaming up with an eco-entrepreneur and receiving an unexpected boost from the country’s recent trash crisis the future remains uncertain. John Owens reports from Sarafand.
    Video

    Video Migrants Continue to Risk Lives Crossing US Border from Mexico

    In his speech Thursday before the Republican National Convention, the party’s presidential candidate, Donald Trump, reiterated his proposal to build a wall along the U.S.-Mexico border if elected. Polls show a large percentage of Americans support better control of the nation's southwestern border, but as VOA’s Greg Flakus reports from the border town of Nogales in the Mexican state of Sonora, the situation faced by people trying to cross the border is already daunting.
    Video

    Video In State of Emergency, Turkey’s Erdogan Focuses on Spiritual Movement

    The state of emergency that Turkish President Recep Tayyip Erdogan has declared is giving him even more power to expand a purge that has seen an estimated 60,000 people either arrested or suspended from their jobs. VOA Europe correspondent Luis Ramirez reports from Istanbul.
    Video

    Video Calm the Waters: US Doubles Down Diplomatic Efforts in ASEAN Meetings

    The United States is redoubling diplomatic efforts and looking to upcoming regional meetings to calm the waters after an international tribunal invalidated the legal basis of Beijing's extensive claims in the South China Sea. VOA State Department correspondent Nike Ching has the story.
    Video

    Video Scientists in Poland Race to Save Honeybees

    Honeybees are in danger worldwide. Causes of what's known as colony collapse disorder range from pesticides and loss of habitat to infections. But scientists in Poland say they are on track to finding a cure for one of the diseases. VOA’s George Putic reports.

    Special Report

    Adrift The Invisible African Diaspora