【文章內(nèi)容簡介】
ed, the snow waterwould be pure, not salty as seaice would be. there is so much potential pure water herethat it would need only a fraction to turn much of the desert or poorly irrigated parts ofthe world into rich farmland. and what useful packages would e in ! it should bepossible to hack off a bit of ice and transport it!alternatively perhaps a passing icebergcould be captured. they are always breaking away from the main caps and floatingaround, pushed by currents, until they eventually melt and are wasted.many icebergs are, of course, much too small to be towed any distance, and wouldmelt before they reached a country that needed them anywhere. it would be necessaryto harness one that was manageable and that was big enough to provide a good supplywhen it reached us. engineers think that an iceberg up to 11 kilometres long and 2kilometres wide could be transported if the tug pulling it was as big as a supertanker!even