A | (ECNS) -- Hot days worldwide could experience around four additional hours of extreme heat by the end of the 21st century under a high-emissions scenario, according to a study led by Chinese researchers. Published in Nature Climate Change, the study found that traditional daily temperature indicators may overlook shorter periods of extreme heat, while hourly temperature analysis can provide a more detailed picture of heat exposure and associated risks. Researchers from Sun Yat-sen University and other institutions analyzed global hourly temperature data from 1981 to 2023, combining observational records with climate model projections to assess how extreme heat exposure could change in the future. The research team found that the duration of extreme heat increased by 62 hours per decade over the study period. Around 28% of extreme heat events occurred on days that would not have been classified as hot days based on conventional daily temperature indicators. Under a high-emissions scenario known as SSP5-8.5, the researchers projected that between 2070 and 2099, each hot day could experience around four additional hours of extreme heat compared with the 2001-2023 period. Days not classified as hot could also see increased periods of extreme heat. The study also found that low- and middle-income countries account for a disproportionately large share of both current and projected extreme heat exposure. Younger generations in low-income countries are expected to experience the greatest increase in lifetime exposure. Researchers said the findings could help improve heat-warning systems, strengthen assessments of health risks and support climate adaptation efforts. (By Helen Mo, intern Liu Shuangjing) 
。 8 月 25 日消息，广汽集团今日宣布，8 月 25 日，广汽领程与新石器联合开发的首款无人车在广州从化工厂正式下线。此次下线的 X6 无人车，是双方自今年 3 月签署战略合作协议以来联合开发的首款车型。
B | 广汽领程新能源商用车有限公司是广州汽车集团股份有限公司下属商用车版块的代表企业，成立于 2007 年，由广州汽车集团股份有限公司、日野自动车株式会社、广州氢云新能源科技投资合伙企业（有限合伙）分别持股 89.72%、4.83%、5.45%，由广汽集团主导经营。官方表示，X6 无人车聚焦城市末端配送与支线物流场景，拥有 6 立方米装载空间，可有效满足电商、生鲜、商超、药品等多场景配送需求，为构建覆盖全场景、全天候、全时段的智能配送生态体系奠定了坚实基础。获悉，双方合作的 12 立方米、20 立方米无人车后续也将陆续推出。
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