A Slashdot reader writes: Denmark plans to cull its entire population of roughly 15 million minks in farms after the animals spread a mutation of the coronavirus to humans. The country's prime minister, Mette Frederiksen, said at a press conference Wednesday that the mutated virus could spread to other countries and it "may pose a risk to the effectiveness of a future vaccine." "We have a great responsibility towards our own population, but with the mutation that has now been found, we have an even greater responsibility for the rest of the world as well," she said. The mutated virus was found in a dozen people who got infected by minks. Half of the 783 human Covid-19 cases in northern Denmark "are related to mink," Health Minister Magnus Heunicke said. Mike Ryan, the head of the emergencies program for the World Health Organization, has called for scientific investigations of the "complex, complex issue" of people outside of China infecting minks, which in turn transmitted the virus back to humans. Kare Molbak, a director at the research center Statens Serum Institut, said the worst-case scenario would be "a new pandemic, starting all over again out of Denmark." "That's why we have to take this extremely seriously," Molbak said. There are between 15 million and 17 million minks in Denmark, one of the world's main mink fur exporters. According to government estimates, culling the country's mink population could cost up to $785 million. National police head Thorkild Fogde urged that 'it should happen as soon as possible."

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Many industries use heat-intensive processes that generally require the burning of fossil fuels, but a surprising green fuel alternative is emerging in the form of metal powders. Ground very fine, cheap iron powder burns readily at high temperatures, releasing energy as it oxidizes in a process that emits no carbon and produces easily collectable rust, or iron oxide, as its only emission. From a report: If burning metal powder as fuel sounds strange, the next part of the process will be even more surprising. That rust can be regenerated straight back into iron powder with the application of electricity, and if you do this using solar, wind or other zero-carbon power generation systems, you end up with a totally carbon-free cycle. The iron acts as a kind of clean battery for combustion processes, charging up via one of a number of means including electrolysis, and discharging in flames and heat. Recently, Swinkels Family Brewers in the Netherlands has become the first business in the world to put this process to work at an industrial scale. The company has been working with the Metal Power Consortium and researchers at TU Eindhoven to install a cyclical iron fuel system at its Brewery Bavaria that's capable of providing all the heat necessary for some 15 million glasses of beer a year.

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