[NYCFarmboy]

By Anne Ryan, USA TODAY

http://www.usatoday.com/tech/science...vy-study_x.htm

WASHINGTON (AP) — Another reason to worry about global warming: more and itchier poison ivy. The noxious vine grows faster and bigger as carbon dioxide levels in the atmosphere rise, researchers report Monday.
And a CO2-driven vine also produces more of its rash-causing chemical, urushiol, conclude experiments conducted in a forest at Duke University where scientists increased carbon-dioxide levels to those expected in 2050.

Carbon dioxide is a greenhouse gas — a chemical that traps heat similar to the way a greenhouse does — that's considered a major contributor to global warming. Greenhouse gases have been steadily increasing in the atmosphere since the Industrial Revolution.

Poison ivy is common in woods around the country, making it a bane of hikers, campers, fighters of forest fires, even backyard gardeners. Its itchy, sometimes blistering rash is one of the most widely reported ailments to poison-control centers, with more than 350,000 reported cases a year.

Compared to poison ivy grown in usual atmospheric conditions, those exposed to the extra-high carbon dioxide grew about three times larger — and produced more allergenic form of urushiol, scientists from Duke and Harvard University reported.

Their study appears in this week's Proceedings of the National Academy of Sciences.

"The fertilization effect of rising CO2 on poison ivy ... and the shift toward a more allergenic form of urushiol have important implications for the future health of both humans and forests," the study concludes.

..
my 2 cents,
add this to the list of doom and gloom being foretold.

[itistoday]

What an incredibly vapid thread.

[NYCFarmboy]

lol...well I have poisen ivy (was in the woods the other day)..so I now I can blame it on those driving hummers.

[Doofy]

The noxious vine grows faster and bigger as carbon dioxide levels in the atmosphere rise, researchers report Monday.
And a CO2-driven vine also produces more of its rash-causing chemical, urushiol, conclude experiments conducted in a forest at Duke University where scientists increased carbon-dioxide levels to those expected in 2050.

In other news, a US university discovers that plants like CO2. They will be presented with the Nobel Prize for Botany (a new award category specifically created to honour their achievements) later this year.

[itistoday]

Originally Posted by Doofy

In other news, a US university discovers that plants like CO2. They will be presented with the Nobel Prize for Botany (a new award category specifically created to honour their achievements) later this year.

[brassplayersrock²]

they're going to report about this on the fox 25 10 o'clock news here in boston.

[Spliffdaddy]

Well, drat.

No matter which side of the global warming issue you're on - we can all agree that article is rather worthless.

*sigh*

[von Wrangell]

Originally Posted by Spliffdaddy

Well, drat.

No matter which side of the global warming issue you're on - we can all agree that article is rather worthless.

*sigh*

If you take the global warming part out of the article it's actually an interesting find.

That is how increased CO2 affects poison ivy.









..... perhaps it's just interesting for biologists though.....

[Spliffdaddy]

But then, you have to factor-in the evidence that suggests plants will only respond to increased CO2 levels for a brief period, then they revert back to 'normal' growth.

At least that's what the global warming proponents tell you...after you mention that more CO2 is good for plants, and that the increase in plants will offset the high CO2 levels. bleh.

Anyways, the article is lame. As much as I'd love to smackdown some of you treehuggers in yet another global warming debate - I just ain't feeling it.

We need a better article in order to make it worth my time.

[von Wrangell]

Originally Posted by Spliffdaddy

But then, you have to factor-in the evidence that suggests plants will only respond to increased CO2 levels for a brief period, then they revert back to 'normal' growth.

At least that's what the global warming proponents tell you...after you mention that more CO2 is good for plants, and that the increase in plants will offset the high CO2 levels. bleh.

Different plants (just like different animals) respond differently to changes in CO2/O2 levels. Which might upset the balance in the ecosystem. And so on. Can't be arsed describing it in more detail.

But what's perhaps most interesting is the change in the urushiol.

But then again, maybe it's just interesting to biologists.

[ShortcutToMoncton]

I refuse to respond to people who consistently mis-spell "poison."



greg

[Spliffdaddy]

What you meant to say was "Spliffdaddy would own me if I posted any global warming rhetoric".

[Nicko]

Originally Posted by ShortcutToMoncton

I refuse to respond to people who consistently mis-spell "poison."



greg

Indeed. The least he could have done is spellcheck the title.

[ShortcutToMoncton]

Originally Posted by Spliffdaddy

What you meant to say was "Spliffdaddy would own me if I posted any global warming rhetoric".

Hahahaha...yes. That was indeed what I was referring to.

greg


Now Playing: Foo Fighters - Aurora

[tie]

Originally Posted by von Wrangell

..... perhaps it's just interesting for biologists though.....

No, no, no. This is a fascinating thread. Thanks so much to the farmboy! Maybe global warming causes spelling errors, too.

[davesimondotcom]

This thread is useless without pics of a hot, young lolita named Drew Barrymore circa 1992...



Damn Tom Skerrit... lucky bastard.

Nothing like a movie that starts out with a girl on a swing discussing how a girl's lips reflect what her other set of lips look like...

Sorry, I've always had a crush on Drew and that movie came out at a very influential time in my life...

[itistoday]

I need to see this movie.

[Y3a]

A greenhouse has plants growing in it right?
So they breath in Carbon Dioxide and breath out oxygen right?
So why isn't Oxygen a greenhouse gas?

[SpaceMonkey]

Originally Posted by Y3a

A greenhouse has plants growing in it right?
So they breath in Carbon Dioxide and breath out oxygen right?
So why isn't Oxygen a greenhouse gas?

Wow.

Edit, for clarification: A greenhouse works by allowing the sun to warm the ground inside it, which warms the air, which is prevented from rising by the structure of the greenhouse. It has nothing to do with the gases inside. The "greenhouse effect" is something of a misnomer.

[itistoday]

Originally Posted by Y3a

So why isn't Oxygen a greenhouse gas?

This my friends, is why people don't "believe" in Global Warming. Ignorance.

[itistoday]

Originally Posted by SpaceMonkey

It has nothing to do with the gasses inside. The "greenhouse effect" is something of a misnomer.

I wouldn't say it's a misnomer. CO2 traps heat just like the windows on a greenhouse, therefore "greenhouse effect" seems appropriate.

[SpaceMonkey]

Originally Posted by itistoday

I wouldn't say it's a misnomer. CO2 traps heat just like the windows on a greenhouse, therefore "greenhouse effect" seems appropriate.

It is superficially similar, but the mechanism in each process is actually different. The key difference is that a real greenhouse works by limiting convection, and the "greenhouse effect" as it applies to the atmosphere works by limiting radiation loss.

[itistoday]

Originally Posted by SpaceMonkey

It is superficially similar. But the key difference is that a real greenhouse works by limiting convection

That's not all it does though, the windows also literally traps heat inside of it. If all it did was limit convection, then any ol' room that was closed off from the outside world would be just as hot.

[SpaceMonkey]

Originally Posted by itistoday

That's not all it does though, the windows also literally traps heat inside of it.

You have just defined convection. Congratulations. Convection is basically the transferance of heat by the mixing of liquids or gases, which a greenhouse obviously blocks. The greenhouse effect in the atmosphere operates because of different gases' ability to absorb low-wavelength radiation, not by limiting the physical mixture of the gases in any way.

[itistoday]

Originally Posted by SpaceMonkey

You have just defined convection. Congratulations. Convection is basically the transferance of heat by the mixing of liquids or gases, which a greenhouse obviously blocks. The greenhouse effect in the atmosphere operates because of different gases' ability to absorb low-wavelength radiation, not by limiting the physical mixture of the gases in any way.

Heh... I admit I was shaky on the definition of convection. I thought it was just the movement of cooler/warmer air.

[Doofy]

Originally Posted by davesimondotcom

This thread is useless without pics of a hot, young lolita named Drew Barrymore circa 1992...

I'll see your Drew Barrymore and raise you a Jaime Pressly. (Poison Ivy 3)

[olePigeon]

Originally Posted by Y3a

A greenhouse has plants growing in it right?
So they breath in Carbon Dioxide and breath out oxygen right?
So why isn't Oxygen a greenhouse gas?

"How did your uneducated kind ever take Jerusalem?"

[Nicko]

Originally Posted by olePigeon

"How did your uneducated kind ever take Jerusalem?"

best move ever.

[Y3a]

You can lead a horse to water but a pencil has to be lead...

[von Wrangell]

Originally Posted by Y3a

A greenhouse has plants growing in it right?
So they breath in Carbon Dioxide and breath out oxygen right?
So why isn't Oxygen a greenhouse gas?

or



or



Can't decide....

[Doofy]

Originally Posted by von Wrangell

...is the correct answer.