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News Stories relating to "trees"

Want to Reduce Crime? Plant Trees!

After the recent Colorado massacre, we ALL want to reduce violence, but we're divided about how to do it. Sociologists think that "greening" vacant lots may be associated with reductions in certain gun crimes (and it's certainly easier...
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What Tree Rings Reveal

Tree rings can tell you a lot: The Japanese have discovered that, in the late eighth century, the earth was hit by a mysterious blast of cosmic rays (NOTE:...
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How to Save Our Cities

Plant trees! - One of the most important things we can do to save our cities from global warming in the future is to plant more trees now.

Researcher Brian Stone says, "Across the US as a whole, approximately 50% of the warming that has occurred since 1950 is due to land use changes (usually in the form of clearing...

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Tree Power

Most of us have never heard of about tree power, but it turns out that it's there, hiding in the shadows, in small but measurable quantities. A group of researchers tested this by using their local trees to run an electronic circuit. Will forests someday replace windfarms?

Researcher Babak Parviz says, "As far as we know this is the...

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Why Leaves are Changing Later

The earth is changing, and so are the leaves (but not as fast as they usually do). Are you frustrated by your attempts to go leaf peeping this season, since those fall colors seem to show up later and later? Scientists put it down to the same problem that's causing global warming: Too much carbon dioxide in the atmosphere, which prolongs the...

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Fake Trees are Fine

For some things - Living trees are a vital part of the earth but fake ones can be important too. Engineers want to plant a forest of 100,000 "artificial trees" within the next 10 to 20 years to help soak up the world's greenhouse gases by capturing the CO2 from the air through a filter. The greenhouse gas would then be removed...

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Trees on the Move

Birds are doing it, now trees are too.

All over the world, trees are moving to new places to escape warmer temperatures. They are taking root at higher elevations as well. But this isn't happening in response to hot summer temperatures: warmer WINTER temperatures are the cause.

In BBC News, Matt Walker quotes biologist Melanie...

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What Do Trees Have to Do With It?

We know that global warming causes more hurricanes, but do trees have anything to do with global warming?

Biologist Jeffrey Chambers discovered that the losses inflicted by Hurricane Katrina on Gulf Coast forest trees were enough to cancel out a year's worth of new tree growth in other parts of the country. And trees absorb carbon...

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Cities Becoming Vast Cement Wastelands

U.S. cities have lost more than 20% of their trees in the past 10 years, due to urban sprawl and highway construction. This has contributed to environmental and health problems that have cost an estimated $234 billion, according to the group American Forests. Gary Moll says, "America's cities are developing a huge tree deficit."

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Pollution Affects Trees

But Not the Way You Think - Pollution in New York City is affecting trees?it's making them grow bigger than the same kind of trees growing in the country. Ecologist Jillian Gregg says, "City-grown pollution, and ozone in particular, is tougher on country trees."

Ground-level ozone is created by the action of sunlight on...

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Tree Rocks

Something strange is going on in the 23,000 acre Yellowwood State Forest in Indiana. At least 5 large rocks are sitting in the tops of tall trees, wedged in the branches. The first one was discovered a few years ago, 30 feet off the ground in an 80-foot-tall chestnut oak tree and has been named Gobbler's Rock, because it was found by a turkey...

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