News / Science & Technology

Dung Beetles Clean Air

Dung Beetle (File photo)
Dung Beetle (File photo)
VOA News
Dairy farms and cattle ranches are a major source of greenhouse gases, especially methane, which has a significant warming impact in the environment. It's primarily released from both ends of cows as they chew their cud, but some is also emitted from their manure. Researchers from the University of Helskinki have found that dung beetles living in these so-called cow patties may reduce those emissions.

Head researcher Tomas Roslin explains that the carbon dioxide in the plants eaten and expelled by cattle is converted to methane in anaerobic conditions. There is not much oxygen in a dense cow pattie. However, by tunneling and digging around in the patties, dung beetles aerate them, exposing more surface area to the air, thereby reducing methane production. Carbon dioxide is still released, but it is not as potent as greenhouse gas.

While researchers say the beetles could have a major impact on how carbon escapes from cow pastures, they also raise concerns about the steep declines in many dung beetle species. In an article in the journal PLOS One, they warn that with the growing appetite for meat around the world, "overall emissions from cattle farming can only increase."

You May Like

Video Drug Use Rises in Afghanistan

Ninety percent of world’s heroin comes from Afghanistan More

Here's Your Chance to Live in a Deserted Shopping Mall

About one-third of the 1200 enclosed malls in the US are dead or dying. Here's what's being done with them. More

Video NASA: Big Antarctica Ice Shelf Is Disintegrating

US space agency’s new study indicates Larsen B shelf could break up in just a few years More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Poverty, Ignorance Force Underage Girls Into Marriagei
X
May 21, 2015 4:14 AM
The recent marriage of a 17-year old Chechen girl to a local police chief who was 30 years older and already had a wife caused an outcry in Russia and beyond. The bride was reportedly forced to marry and her parents were intimidated into giving their consent. The union spotlighted yet again the plight of many underage girls in developing countries. Zlatica Hoke reports poverty, ignorance and fear are behind the practice, especially in Asia and Africa.
Video

Video Poverty, Ignorance Force Underage Girls Into Marriage

The recent marriage of a 17-year old Chechen girl to a local police chief who was 30 years older and already had a wife caused an outcry in Russia and beyond. The bride was reportedly forced to marry and her parents were intimidated into giving their consent. The union spotlighted yet again the plight of many underage girls in developing countries. Zlatica Hoke reports poverty, ignorance and fear are behind the practice, especially in Asia and Africa.
Video

Video South Korea Marks Gwangju Uprising Anniversary

South Korea this week marked the 35th anniversary of a protest that turned deadly. The Gwangju Uprising is credited with starting the country’s democratic revolution after it was violently quelled by South Korea’s former military rulers. But as Jason Strother reports, some observers worry that democracy has recently been eroded.
Video

Video California’s Water System Not Created To Handle Current Drought

The drought in California is moving into its fourth year. While the state's governor is mandating a reduction in urban water use, most of the water used in California is for agriculture. But both city dwellers and farmers are feeling the impact of the drought. Some experts say the state’s water system was not created to handle long periods of drought. Elizabeth Lee reports from Ventura County, an agricultural region just northwest of Los Angeles.
Video

Video How to Clone a Mammoth: The Science of De-Extinction

An international team of scientists has sequenced the complete genome of the woolly mammoth. Led by the Swedish Museum of Natural History in Stockholm, the work opens the door to recreate the huge herbivore, which last roamed the Earth 4,000 years ago. VOA’s Rosanne Skirble considers the science of de-extinction and its place on the planet
Video

Video Blind Boy Defines His Life with Music

Cole Moran was born blind. He also has cognitive delays and other birth defects. He has to learn everything by ear. Nevertheless, the 12-year-old has had an insatiable love for music since he was born. VOA’s June Soh introduces us to the young phenomenal harmonica player.
Video

Video Women to March for Peace Between Koreas

Prominent female activists from around the world plan to march through the demilitarized zone dividing North and South Korea to call for peace between the two neighbors, divided for more than 60 years. The event, taking place May 24, marks the International Women's Day for Peace and Disarmament and has been approved by both Koreas. Zlatica Hoke has more.
Video

Video Drug Use Rises in Afghanistan Following Record High Poppy Crops

Afghanistan has seen record high poppy crops during the last few years - and the result has been an alarming rise in illegal drug use and addiction in the war-torn country. VOA's Ayesha Tanzeem has this report from Kabul.
Video

Video America’s Front Lawn Gets Overhaul

America’s front yard is getting a much-needed overhaul. Almost two kilometers of lawn stretch from the U.S. Capitol to the Washington Monument. But the expanse of grass known as the National Mall has taken a beating over the years. Now workers are in the middle of restoring the lush, green carpet that fronts some of Washington’s best-known sights. VOA’s Steve Baragona took a look.

VOA Blogs