Scientists racing to tackle plastic pollution have created a surprising new contender: a biodegradable packaging film made partly from milk protein. Researchers at Flinders University blended calcium caseinate with starch and natural nanoclay to form a thin, durable material designed to mimic everyday plastic. In soil tests, the film fully broke down in about 13 weeks, pointing to a realistic alternative for single-use food packaging.
Угрозу применения ядерного оружия в конфликте вокруг Ирана оценили14:57
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"I think the difference is we're all ordinary people and there's some people who let other people watch you be an ordinary person.
第八条 国家加强原子能科学知识和法律知识的宣传教育，鼓励有条件的地方人民政府、核设施营运单位以及其他有关单位建设和利用科普场馆、设施，开展原子能科学知识普及活动。