27.郭怀德 湖北省鄂州市鄂城区西山街道社区卫生服务中心副主任
As concerns grow about the environmental and health impacts of plastic waste, scientists are accelerating efforts to develop safer, biodegradable alternatives. At Flinders University in South Australia, several research teams are working on new materials designed to reduce pollution from single use plastics.
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На шее Трампа заметили странное пятно во время выступления в Белом доме23:05