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So I was looking at how much water it would require for an adequate radiation shield for space travel and found the following chart.https://archive.org/details/RadiationShielding/page/n3It must have been an awesome test. How many Mars bars it took to complete measurements? Hint: look at the material in the middle of the list.
I debated where to post this link. I think here is best... Another dopey idea to entertain us, and distract from the real work of reducing CO2.Seems this idea won some kind of prize...(!) Refreeze the arctic using large 'submarine-like' floating ice-cube machines. I don't know whether to laugh or cry.https://www.dezeen.com/2019/07/27/refreezing-the-arctic-geoengineering-design-climate-change/
Either the link is missing or the attachment is not approved?