«--Previous Post | Blog Index | Next Post--»
Trees Offset Carbon Footprint, But Which Trees?
Trees trap and absorb carbon dioxide as they grow. That's how they help remove carbon dioxide from the atmosphere, mitigating or reducing global warming. But a new study from the Carnegie Institution and the Lawrence Livermore National Laboratory suggests the effectiveness of this strategy depends heavily on where these trees are planted. Because tropical forests store large amounts of carbon and produce reflective clouds, they are especially good at cooling the planet. In contrast, forests in snowy areas can warm the Earth, because their dark canopy absorbs sunlight that would otherwise be reflected back to space by a bright white covering of snow. "Tropical forests are like Earth's air conditioner," says Ken Caldeira of Carnegie’s Department of Global Ecology. "When it comes to rehabilitating forests to fight global warming, carbon dioxide might be only half of the story; we also have to account for whether they help to reflect sunlight by producing clouds, or help to absorb it by shading snowy tundra." --Julia Whitty
Comments
Certain species of trees are also better at sequestering carbon, typically those that rot more slowly. However, the big factor is in what is done with the trees. Tree farms do little to help since they are cut down every 30 years or so, thus re-releasing the carbon.
Also, keep in mind that in old growth forests, 99% of the carbon is actually sequestered for tens of thousands of years, in the soil. Clearcutting such forests releases not just the vast amounts of carbon in the trees, but 100 times that from the soil that begins to erode very quickly.
So, when we work toward reforestation, we must also try to do so in a naturalistic way, with multiple species of trees that are allowed to grow untouched for thousands of years. Yes, I know it's a tad time-consuming, but we didn't think about that when we cut down all of those forests.
And, we're still doing it. Kimberly Clark, maker of Kleenex and Scott Tissue, refuses to even consider stopping clearcutting of old growth forest to make their tissues and toilet paper. Marcal and Green Forest offer good alternatives made from recycled paper if this moves you to boycott Kimberly Clark.
if you would like the info on the greatest carbon sequestration tree please go to planitplantitplanet.org
haste makes less waste in this case
Posted by: justin watson on 11/21/07 at 12:20 AM Respond
Thanks Justin. The Paulownia has a working market in the lumber industry and is well sought after America now with a sustainable renewable resource tag. 4 to 5 year old trees yielding a conservative 200 to 300 board feet. Harvests can start as soon as the 1st year harvesting 16 to 30 foot poles at 4” to 5” diameter Paulownia, originally from China, can produce a butt log of mill able quality hardwood timber within four to six years. This compares with a minimum of 18-20 years for other hardwoods.
Characteristics: Wood harvested from faster-growing trees tend to be darker in color whereas slower growing trees from cooler climates produces a finer grained, lighter wood. Paulownia provides the craftsman with a wood that is non-warping, resistant to water damage and rot, unaffected by humidity and does not require kiln drying. Prized in Japan for centuries for it’s beauty, workability and light weight.
Paulownia has the potential to become the wood of choice in the North American market.
Posted by: Tree person on 11/21/07 at 7:18 AM Respond
ARCHIVE
RECENT COMMENTS
Dog Helps Orca (3)
S wrote:
dog, help us understand ur point....
[more]
All-Expenses-Paid India Vacation, Courtesy of Your Health Insurer (7)
DIY wrote:
Just as we shouldn't be subsidizing any (specific) church,...
[more]
Bus Economy Booming (2)
Abe wrote:
I love Boltbus, although I wish the Philadelphia to Washin...
[more]
Eco-Barbie? Mattel Gives This 'Green' Thingamajig a Whirl (2)
moon wrote:
I surfed all the web till found the best searcher. Films,...
[more]
Obesity Linked To Grandparent's Diet (3)
Jay wrote:
Its a pretty sick thought: A woman is carrying a child, a ...
[more]
Huntington vs. Burlington: How to Grow a Healthy City (19)
tammy wrote:
oh boo hoo. i am so tired of hearing these stupid argument...
[more]
CO2 Levels Already in Danger Zone (5)
bigjim-ky wrote:
NASA is faking data, Al Gore is blowing away tens of thous...
[more]
In Congo Conflict, Endangered Gorillas Are Pawns (4)
peta wrote:
According to this AP story, the rebels often eat the slaug...
[more]
Clean Up the Coal Plants, Then Clean Out the Fridge (2)
Charlie wrote:
I looked at the quantities involved. If you were to use th...
[more]
Climate Crisis Needs Brilliant Minds (2)
Mary K. Butler wrote:
I am a person whom feels the Climate Crisis is top on my l...
[more]
Movable Type 3.33


Posted by: Misanthropic Scott on 04/11/07 at 6:52 AM Respond