That should be *Castor canadensis, *not the Cuban nondescript. On Wednesday, March 27, 2013 2:56:27 PM UTC-4, Russell Seitz wrote: > > > Amount of styrofoam required to stably float a polar bear & cubs : ~ 3 > m3 ~ = a 6 m hexagon ~ 10 cm thick > > Weight of such a strong styrofoam platform 100 kg > > Area " " " ' ~ 25 sq. meters > > Number per square kilometer ~ 40,000 > > Weight of styrofoam per km2 4,000 tones > > Area off summer ice loss in last decade ~ 3,000,000 -4,000,000 km2 > > Mass of styrofoam required for polar bear friendly replacement of lost > ice : ~12- 16 billion tonnes > > Mass of needed polystyrene as percentage of annual world petroleum > production : 300- 400 % > > Cost at $130 bbl : > $10,000,000,000,000, plus installation. > > Cost per polar bear: ~ fifty million dollars > > Since beavers transform many hectares of moderate albedo forest into > blackwater ponds, shooting *Castor faber* and * Castro canandensi*s may > therefore hold more promise in constraining albedo loss than conserving > *Ursus > marinus,* > > > Sorry. > > On Wednesday, March 27, 2013 6:27:52 AM UTC-4, denskee wrote: >> >> My suggestion is to use the waste plastic which is generated at an >> alarming rate, to manufacture rafts in a hexagonal or octagonal shape, each >> linked to it's immediate neighbour at the corners with a coupling. This >> coupling will enable each raft to move slightly independantly to allow for >> wave movement. The upper surface of each raft would need to be either >> white or silver to reflect sunlight, much as the ice does. Such rafts >> should be large enough to support creatures such as sealions and seals. >> Polar bears might be too much of a stretch. There would therefore need to >> be an occasional raft left out of the pattern to enable such creatures to >> enter and leave the sea. >> If a number of identical moulds were created around the planet each >> country with hopefully a number of such moulds could produce these rafts >> before the waste left the country, and conceivably shipping companies >> could convey them to particularly North polar countries where they could >> be assembled into large rafts. >> Already this plastic waste is shipped around the planet, why not have it >> shipped as an end, and particularly useful, product ? >> A similar product could be manufactured form this waste to basically be >> anchored on the ground where the ice has already receeded, and could be >> made perhaps in reinforced sheet form, to enable it to withstand weather >> extremes. Whether those countries within the arctic circle would allow such >> masking of their territory, is another matter. >> >> >
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