Become a fan on Facebook Follow us on Twitter USDA Blog Feed Watch USDA videos on YouTube Subscribe to receive e-mail updates View USDA Photos on Flickr Subscribe to RSS Feeds

Posts tagged: trees

Trees Give Roads a Breath of Fresh Air

Roadside vegetation, such as that on Interstate 40 near Mebane, N.C., has shown to improve air quality in surrounding communities. (U.S. Environmental Protection Agency)

Roadside vegetation, such as that on Interstate 40 near Mebane, N.C., has shown to improve air quality in surrounding communities. (U.S. Environmental Protection Agency)

It’s Clean Air Month, and roadside trees are cleaning the air and helping us feel better.

If you live in an area where there’s a lot of people and traffic, air quality may have crossed your mind at one point or another—and rightly so. In recent years, the health of people living, working or going to school near roads with high traffic volume has been a quickly rising national concern. All over the world, studies are finding air pollution levels especially elevated in these areas.

A multidisciplinary group of researchers, planners and policymakers from the U.S. Environmental Protection Agency, U.S. Forest Service and other organizations found that strategically planting trees near busy roadways may significantly enhance air quality. Their findings were published last year in the Transportation Research Board magazine. Read more »

Picture it! Conservation!

This month USDA will be highlighting the value of conservation with a different focus each week.

Sometimes the benefits of conservation can be abstract. For example, think a minute about the dollar value of a single tree. Can you come up with a number?

Did you consider that the tree creates oxygen, captures carbon and provides wildlife habitat? Or that the tree serves as a windbreak, shades and cools the surrounding area, and improves water quality? Don’t forget, these benefits extend for many decades over the lifetime of a healthy tree. Read more »

Researchers Track “Gray Ghosts” Across the Southern Appalachians

Gray ghosts are a common sight in the southern Appalachians. A hemlock woolly adegid infestation has killed many hemlock trees in the Linville Gorge area of Pisgah National Forest in North Carolina. (U.S. Forest Service/Steve Norman)

Gray ghosts are a common sight in the southern Appalachians. A hemlock woolly adegid infestation has killed many hemlock trees in the Linville Gorge area of Pisgah National Forest in North Carolina. (U.S. Forest Service/Steve Norman)

Residents of the Appalachian Mountains of the eastern United States have long enjoyed a rich culture of storytelling. Often rooted in a deep connection to the natural world, stories from Appalachian folklore serve to entertain as well as to educate; sometimes, important life lessons emerge, especially from tales of demise. A present-day ghost story from the southern Appalachians has captured the attention of U.S. Forest Service researchers who are using high-tech tools to follow the footprints of lost life.

The ghosts in this story are eastern and Carolina hemlock trees. Hemlocks provide valuable ecosystem services in Appalachian forests, including cover for wildlife and cooling shade along waterways. But they are being killed in increasing numbers by an exotic invasive insect, the hemlock woolly adelgid. Native to Asia, the hemlock woolly adelgid is transported through forests by animals, wind and, accidentally, by people. Often called “gray ghosts” because of their pale, skeleton-like appearance, the dead hemlocks are obvious across the mountain landscape. Using a forest monitoring tool known as ForWarn, scientists are able to see just how devastating the hemlock losses have become across the southern Appalachians, where the hemlock woolly adelgid thrives in the warmer temperatures. Here, the hemlock woolly adelgid is killing trees much more quickly than in the more northern areas of the hemlocks’ range, sometimes in as few as four years after infestation. Read more »

What’s a Pine Cone Got to do With It? Educators use them for Art and Science

This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from the USDA’s rich science and research portfolio.

A pine cone has many purposes. It could serve as a home for birds and insects. Pine cones contain seeds to use in reforestation projects. They even can be made into fanciful ornaments to adorn the 2014 Capitol Christmas Tree.

That’s exactly what students learned during a recent Science Fusion program at the Science Museum of Minnesota.

As part of an overarching mission to the world of science, technology, engineering and math, these special Saturday programs afford underserved Minnesota youth the opportunity to interact with local scientists, engineers, inventors and science educators through hands-on activities. Read more »

USDA-Funded Researchers Map the Loblolly Pine Genome

During the month of April we will take a closer look at USDA’s Groundbreaking Research for a Revitalized Rural America, highlighting ways USDA researchers are improving the lives of Americans in ways you might never imagine, including research into trees that could fuel new energy solutions.

A team of researchers led by the University of California–Davis has mapped the complete genome of the loblolly pine. And if you don’t think that understanding the genetic makeup of loblolly pine is a big deal, perhaps you cannot see the forest for the trees.

Loblolly pine, the most commercially important tree in the United States, is the source of most paper products in this country and 58 percent of timber. On the surface, that might be reason enough for the USDA’s National Institute of Food and Agriculture (NIFA) to invest $14.6 million in 2011 toward science that could increase the productivity and health of American forests. Read more »

Forest Service Applauds the United Nations’ Second Annual International Day of Forests

The forests that cling to the steep slopes and cliffs of New Zealand’s Milford Sound are an example of the many pristine forest lands protected throughout the world (U.S. Forest Service/Robert Westover)

The forests that cling to the steep slopes and cliffs of New Zealand’s Milford Sound are an example of the many pristine forest lands protected throughout the world (U.S. Forest Service/Robert Westover)

A world without forests would be pretty bleak. Life as we know it couldn’t exist. In fact it would, more than likely, be a dead planet. That’s because everything we take for granted; clean air and water, abundant wildlife and nearly every product we use in our daily lives, from the roof above our heads to pencils, wouldn’t exist.

It would be a challenge just to live one day without using a product derived from a tree. Aside from paper, you might not even be able to sit in a chair or desk at school or work. These things are part of our everyday existence because of forests.

Since trees are important for everyone around the world, the United Nations (U.N.) has designated every March 21 as the International Day of Forests. Read more »