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Ibn Erik
22-04-2009, 17:40
ou não? :eek::D

Fatties cause global warming

THE rising number of fat people was yesterday blamed for global warming.

Scientists warned that the increase in big-eaters means more food production — a major cause of CO2 gas emissions warming the planet.

Overweight people are also more likely to drive, adding to environmental damage.

Dr Phil Edwards, of the London School of Hygiene and Tropical Medicine, said: “Moving about in a heavy body is like driving in a gas guzzler.”

Each fat person is said to be responsible for emitting a tonne more of climate-warming carbon dioxide per year than a thin one.

It means an extra BILLION TONNES of CO2 a year is created, according to World Health Organisation estimates of overweight people.

The scientists say providing extra grub for them to guzzle adds to carbon emissions that heat up the world, melting polar ice caps, raising sea levels and killing rain forests.

he environmental impact of fat humans is made even worse because they are more likely to travel by car — another major cause of carbon emissions.

And researchers at the London School of Hygiene and Tropical Medicine say wealthy nations like the US and Britain are getting fatter by the decade.

Dr Phil Edwards said: “Food production accounts for about one fifth of greenhouse gases.

“We need to do a lot more to reverse the global trend towards fatness. It is a key factor in the battle to reduce carbon emissions and slow climate change.

“It is time we took account of the amount we are eating.

“This is about over-consumption by the wealthy countries. And the world demand for meat is increasing to match that of Britain and America.

“It is also much easier to get in your car and pick up a pint of milk than to take a walk.”

The study by Dr Edwards and colleague Ian Roberts is published in the International Journal of Epidemiology.

Dr Edwards went on: “We are not just pointing the finger at fat people. All populations are getting fatter and it has an impact on the environment.

“UK health surveys estimate fatness has increased from an average body mass index of 26 to 27 in the last ten years.

“That’s equivalent to about half a stone for every person.”

Anyone with a BMI above 25 is overweight, while more than 30 is obese.

A staggering 40 per cent of Americans are obese, among 300 million worldwide.

Disasters

Australian Professor Paul Zimmet predicted a disastrous obesity pandemic back in 2006.

And Oxfam warned yesterday that the number of people hit by climate-related disasters will soar by more than half in the next six years to 375million.

The impact of more storms, floods and droughts could overwhelm aid organisations.

Sun doctor Carol Cooper said last night: “I’m not sure which came first, people getting fat and driving or the other way around. It is true fat people eat more food than average.

“A few obese people have a hormone problem, although most simply don’t use enough calories and eat too many. But making them feel guilty antagonises them and may not help.”

http://www.thesun.co.uk/sol/homepage/news/article2387203.ece


os gajos estão a ficar cada vez mais malucos. isto cada vez mais parece-se com o nazismo... :mad:

Ibn Erik
22-04-2009, 17:49
outro mito caído por terra. :rolleyes:


Despite Global Warming, Wildfire Frequency Does Not Increase

As global average temperatures rise, it is widely believed the frequency of wildfires will increase. However, this may not be the case. According to analysis of sediment from lake beds in Northern Alaska, the frequency of wildfires didn’t relate to changes in temperature variation over the last few thousand years. This is strange, surely a warmer climate will dry out vegetation faster, creating more fuel for fires to ignite and spread? Apparently not, there appears to be a far more potent controlling factor at play…

In Southern California, the temperatures easily hit 95°F (35°C) today and I noticed the entire neighbourhood pumping a small reservoir’s-worth of water into their manicured lawns (creating an impressive river down the street). Our garden looks a little dry in comparison, I refuse to turn the sprinklers on until we really need it (for now, the hose will do). Summer appears to have arrived early, making me slightly nervous; the wildfires that blighted this region over the the last few years are sure to return. To make matters worse, we had a surprisingly wet winter, helping the spring growth of vegetation. It may be nice and green now, but all I see is surplus firewood.

However, as the last few thousand years have shown us, no matter how hot it gets, the frequency of wildfires may actually decrease.

Using samples from sediment cores at the bottom of Alaskan lakes, climatologist Philip Higuera of Montana State University has discovered it could be the type of vegetation that grows in response to temperature increases that affects the frequency of subsequent wildfires. There is little indication to suggest the frequency of wildfires increased as global average temperatures increased over the past 15,000 years. This might be counter-intuitive, but it would appear nature has an automatic fire-retardation mechanism.

“Climate is only one control of fire regimes, and if you only considered climate when predicting fire under climate-change scenarios, you would have a good chance of being wrong,” Higuera says. “You wouldn’t be wrong if vegetation didn’t change, but the greater the probability that vegetation will change, the more important it becomes when predicting future fire regimes.”

Using radiocarbon dating techniques, Higuera’s team were able to accurately date the different layers in the metre-long sediment samples. From there, they analysed the charcoal deposits, therefore deriving the wildfire frequency in North Alaska woodlands. In addition, they analysed pollen content to understand what species of plant were predominant over the past 15,000 years. Then, using known climate data for the same period, the researchers were able to correlate the fire frequency with plant species and then relate the whole lot with trends in climate change. The results are very interesting.

One of the key discoveries was that climate change a was less important factor than vegetation changes when related to frequency of wildfires. According to sediment samples over the millennia, despite very dry periods in climate history, wildfire frequency decreases sharply. It appears that during periods of temperature increases, vegetation species change from flammable shrubs to fire-resistant deciduous trees.

“Climate affects vegetation, vegetation affects fire, and both fire and vegetation respond to climate change,” Higuera adds. “Most importantly, our work emphasizes the need to consider the multiple drivers of fire regimes when anticipating their response to climate change.”

Although we may not escape the clutches of wildfires in Southern California this year, the last 15,000 years have shown us that this may gradually change as vegetation adapts to hotter conditions, becoming more fire-resistant…

http://www.universetoday.com/2009/04/21/despite-global-warming-wildfires-do-not-increase/

Beatle
23-04-2009, 08:15
os gajos estão a ficar cada vez mais malucos. isto cada vez mais parece-se com o nazismo... :mad:

Tá-me a cheirar q deves ter umas banhocas a mais!! LOL! :D:D:D

Ibn Erik
23-04-2009, 08:31
tenho e não são poucas. :eek::D:D

olha bem para a minha barriguinha:

http://intellectdeluxes.zip.net/images/barrigudo_f1_fh.jpg

Beatle
23-04-2009, 10:35
Dass... Tás GRAVIDO!!!! Parabéns pelo rebento novo... isso é pra qdo!? :rolleyes::D:D:D:D:D