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Crewed Mission to Mars May Be Exposed to Unsafe Levels of Radiation, Study Warns_我的网站

一 | While scientists and science fiction authors alike have long dreamed of sending crewed missions to Mars, a new study suggests these plans may hit a snag – a big one.,The authors of a yet to be peer-reviewed study argue that the participants of such a mission to Mars would end up being exposed to radiation – namely, to “energetic charged particles from Galactic and Solar origin” – both while in transit and while on the planet itself, with the “thin spacecraft shield” and “rarefied Martian atmosphere” offering little in the way of protection.,The research team attempted to gauge the impact of a simulated 1,000-day mission to Mars on various organs of the human body, and concluded that astronauts may be exposed to radiation doses above one Sievert, which is over the safe limit set by most space agencies, New Scientist points out.,“We suggest mitigation strategies such as improved ways of shielding and dietary supplements, and make recommendations for the safety of astronauts in future crewed missions to Mars,” the team wrote in the abstract of their work available on the arXiv preprint server.,Ideas about how astronauts may be protected from radiation during a mission to Mars have already been proposed, such as the concept of a radiation shield comprised of a fungus found growing at the Chernobyl Nuclear Power Plant.,Last year, one architecture studio even unveiled a project for a self-sufficient and sustainable city that would be built on the red planet itself.。　　讯 8月21日，国务院新闻办公室举行“开局起步‘十五五’”系列主题新闻发布会，介绍发挥积极财政政策作用，推动经济社会高质量发展有关情况。

二 | 　　财政部副部长廖岷在会上介绍，中国作为最大的发展中国家，已经连续多年稳居全球第二大商品消费市场和第一大网络零售市场，而且按照有关口径，中国也是全球最主要的消费品进口市场之一，各国的产品在中国也深受欢迎。所以消费需求正在成为中国经济增长的主动力，这一点日益凸显。我国有14亿人口，中等收入群体超过4亿人，2025年人均GDP超过1.3万美元，社会消费品零售总额也超50万亿元，最终消费支出对经济增长的贡献率达到52%。

三 | 而且随着人民收入水平的不断提高，高消费的需求也更加多样化，我国的服务消费、绿色消费、新型消费是亮点纷呈，旅游、演艺、体育赛事等人气旺盛，智能手表、智能眼镜等产品也是广受追捧，销售也是成倍增长。这些都是我国消费市场内生动力的真实写照。　　财政部门始终坚持扩大内需这一战略基点，推出一系列政策来促进居民消费提质升级，包括：实施消费品以旧换新政策，也就是大家常说的“国补”，把惠民生和促消费有机结合；实施个人消费贷款和服务业经营主体贷款贴息政策，降低居民消费信贷成本；全面落实就业优先战略，支持地方落实各项就业创业扶持政策，促进重点群体就业创业；另外，也深入推进现代商贸流通体系试点城市建设，开展消费新业态新模式新场景试点建设，持续优化消费环境。　　《扩大消费“十五五”规划》提出，要着力提升消费能力，促进高质量充分就业，多渠道增进居民收入，完善社会保障政策，合理增加公共消费。下一步，财政部将按照规划聚焦就业、增收、社保等方面的要求，系统谋划提升居民消费能力的战略举措。短期看，主要是充分发挥当前各项政策效能，推动各项政策措施能够更好更快落地见效，增加大家的获得感。中长期看，主要还是通过持续提升社会保障能力，深化收入分配制度改革，强化税收、转移支付等再分配调节，不断夯实居民能消费、敢消费和愿消费的基础，释放我国超大消费市场的内生动力。版权申明：凡注有“”或电头为“”的稿件，均为独家版权所有，未经许可不得转载或镜像；授权转载必须注明来源为“”，并保留“”的电头。。