Posted by Eeyore on January 16, 2009, 12:11 am
David Williams wrote:
> -> > Correct, there won't be a shortage of energy, you just won't be able to
> -> > afford it. like anything else, it'll be there, but at what cost?
> -> How much does it cost to chop a tree down ? Carbon neutral fuel too.
> -> Graham
> That's what they did in Haiti. Now, there are virtually no trees left,
> the soil is washing into the sea so crops won't grow. The place is a
> disaster.
You're supposed to *re-plant* trees after chopping then down dummy. Only Black
African descendents could be so stupid as to forget that.
Why does Haiti need heat anyway ?
Graham
Posted by Eeyore on January 17, 2009, 4:15 am
David Williams wrote:
> -> Why does Haiti need heat anyway ?
> -> Graham
> Ever heard of cooking?
Solar cooker.
Graham
Posted by Eeyore on January 17, 2009, 4:16 am
David Williams wrote:
> -> > I've heard that a carefully managed 5 acre woodlot will heat a house
> -> > perpetually.
> ---
> -> Grow more woods ! They cost effectively zero.
> -> Graham
> Five acres is about two hectares. Suppose the household has four
> people. That means half a hectare per person will be needed for growing
> wood for heating. Multiply that by, say, a billion (most people in the
> world live in warm places), that means 5e8 hectares of land will be
> needed. That's 5e12 m^2, or an area more than 2000 x 2000 km. Something
> like the size of Europe. Do you really want to use that much good
> agricultural land for growing heating fuel?
How did you calculate their heating needs ?
Graham
Posted by Eeyore on January 17, 2009, 12:41 pm
David Williams wrote:
> -> > -> Why does Haiti need heat anyway ?
> -> >
> -> > -> Graham
> -> >
> -> > Ever heard of cooking?
> -> Solar cooker.
> -> Graham
> It's often cloudy there.
Is it ? Didn't we already do wood for heat ? Dried cow dung works too.
Graham
Posted by Eeyore on January 17, 2009, 12:42 pm
David Williams wrote:
> -> > -> > I've heard that a carefully managed 5 acre woodlot will heat a house
> -> > -> > perpetually.
> -> > ---
> -> > -> Grow more woods ! They cost effectively zero.
> -> >
> -> > Five acres is about two hectares. Suppose the household has four
> -> > people. That means half a hectare per person will be needed for growing
> -> > wood for heating. Multiply that by, say, a billion (most people in the
> -> > world live in warm places), that means 5e8 hectares of land will be
> -> > needed. That's 5e12 m^2, or an area more than 2000 x 2000 km. Something
> -> > like the size of Europe. Do you really want to use that much good
> -> > agricultural land for growing heating fuel?
> -> How did you calculate their heating needs ?
> It's all in the paragraph. 5 acres of trees per household of 4. One
> billion people in the world (probably an under-estimate) requiring
> heating.
> The 5 acres per house figure was from a previous post by someone else.
So you didn't calculate it. I thought as much.
Graham
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> -> > afford it. like anything else, it'll be there, but at what cost?
> -> How much does it cost to chop a tree down ? Carbon neutral fuel too.
> -> Graham
> That's what they did in Haiti. Now, there are virtually no trees left,
> the soil is washing into the sea so crops won't grow. The place is a
> disaster.