civilization, mathematic help please.

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with 7 billion people, how much food per year per person would it take to keep us fed without any form of malnutrition?

And on another note, everything we do nowdays releases heat, everyone has a cellphone, a pc a fridge a stove/oven dishwasher vacuum, electricity turns into heat rather easily im pretty sure, and then we have 7-8 (w/e) billion people breathing and releasing heat, smoking cigs etc..

would that have any effect on global temperature? well, compared to greenhouse gas emissions, would it be significant?

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Re: civilization, mathematic help please.

OGIONIK wrote:

would that have any effect on global temperature? well, compared to greenhouse gas emissions, would it be significant?

Absolutely. It's fairly well accepted that the planet could not cope if current Western consumption levels were replicated by developing nation populations.

By way of explanation the USA is said to contribute 25% of greenhouse gases and it only has 5% of the global population. You do the math if every other nation had the same outputs. Australia and Canada have a higher output per person but significantly smaller populations - but the same maths works.

Start here for readings: http://en.wikipedia.org/wiki/Carbon_footprint

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hh wrote-

Quote:

Absolutely. It's fairly well accepted that the planet could not cope if current Western consumption levels were replicated by developing nation populations.

It's the new form of feudalism. The rich man's castle has a missile defence shield instead of high walls. The immigration laws are the drawbridge. The RoW is the waste dump.

As Spengler remarked in a footnote-

Quote:

The great mass of Socialists would cease to be Socialists if they could understand the Socialism of the few who grasp its consequences.

Something like that.

I'm alright Jack. Good innit?

According to the Sunday Times the Bali festivities polluted more than Chad can manage in a year.

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Re: civilization, mathematic help please.

OGIONIK wrote:

And on another note, everything we do nowdays releases heat, everyone has a cellphone, a pc a fridge a stove/oven dishwasher vacuum, electricity turns into heat rather easily im pretty sure, and then we have 7-8 (w/e) billion people breathing and releasing heat, smoking cigs etc..

would that have any effect on global temperature? well, compared to greenhouse gas emissions, would it be significant?

The Earth sheds heat via radiation, so while people are generating heat, the Earth spits it out so that the overall effect is negligible. That doesn't mean there aren't local effects. You can see heat plumes from satelites coming from most industrial cities and that can effect local weather.

Global warming comes from the insulating properties of greenhouse gases. By stopping the Earth from radiating heat away, the overall temperature must rise to increase heat transfer rates back up to where they were. But the heat we're talking about is heat from the Sun, not man-made heat. The Sun pumps a lot more heat into the Earth than we do.

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engineer--

To what extent is global warming self correcting. Is there a point where the warmer the earth gets the faster it radiates heat back into space.

Is there a possibilty that it is really a population problem and that a balance could be maintained where a smaller world population, especially in rich countries, could do what it wants, albeit at higher altitudes, and with the added bonus that land currently under permanent ice would become available for their use.

Was Jesus right about remaining chaste?

Is global warming scaremongering simply a feature of people living at or near sea level worried about their property prices?

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spendius wrote:

engineer--

To what extent is global warming self correcting. Is there a point where the warmer the earth gets the faster it radiates heat back into space.

How many blankets can you put over yourself and your electric water bottle in below freezing weather before you have piled them high enough to make the temperature in your water bottle go back down to freezing?

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I wouldn't know the answer to that because I'm an electric blanket man myself. Under and over too. I don't believe in unnecessary suffering.

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spendius wrote:

I wouldn't know the answer to that because I'm an electric blanket man myself. Under and over too. I don't believe in unnecessary suffering.

Don't put too many blankets on yourself or those electric blankets will radiate so much heat you'll freeze to death.

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Sorry for quoting myself, but I posted this earlier and I don't think it was ever very well addressed.

me wrote:

he .0277 degree per year overshoot can be accounted for between inaccuracies and the increased radiation given off by the earth.

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Engineer has it exactly right.

The vast amount of the energy that heats the Earth comes from the Sun.

The number of humans (or any other organism) there are moving around makes no difference. The very small difference means more heat is radiated into space so moving around doesn't even raise the temperature of the Earth at all.

The Earths temperature is at an equilibrium, the energy coming in equals the energy going out at the "equilibrium temperature"... any change in energy will be compensated for to keep this temperature.

The problem with global warming is that... by changing the chemical composition of the atmosphere, we are changing the "equilibrium temperature".

The issue is the atmosphere... and the overwhelming contributing factor to the dramatic change that is happening is that we are digging up carbon (i.e. oil) that was buried millions of years ago and pumping it into the atmosphere.

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civilization, mathematic help please.

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