Radiation is a form of energy emitted in all directions from a central source. The greatest radiation exposure is caused by natural sources in the environment. There are different types and sources of radiation that can be ionizing. The different types of ionizing radiation are alpha particles, gamma rays, and beta particles. Alpha particle: Alpha particles are positively charged and are produced from the decay of radioactive materials such as uranium, polonium, and radium. They can lead to damage to cells and DNA. Beta particle: Beta particles are negatively charged particles that are emitted during radioactive decay of carbon-14, hydrogen-3, and strontium-90. They can cause skin burns and are hazardous when inhaled or swallowed.

新能源汽车市场快速扩大，动力电池出货量逐年攀升，即将进入退役电池的市场爆发期：根据电池装机量、能量密度、回收率、金属均价等因素对未来五年的动力电池回收利用市场空间进行预测，预计2025年回收利用的市场规模将超过350亿元。动力电池回收利用管理政策日趋完善，从2018年开始政策发布密集程度、规范内容深入程度均有所提升，政策体系已初步建立。未来还需要加快落实财税优惠政策，修订《行业规范条件》，加快梯次利用要求、电池拆卸、包装运输、材料回收等国标发布进程及放电规范、梯次利用产品标识、单体拆解规范的制定工作。

用电淡季气温因素作用不明显，居民生活用电缺少居家效应后恢复常态；三产受疫情冲击最大，反弹幅度也最高。对比2019年同期，各产业用电需求呈现淡季不淡的良好趋势，尤其是前期持续疲弱的三产，到一季度末可认为已基本恢复。面对旺盛的用电需求，来水不足、风光不稳、核电达峰，火电发挥了中流砥柱的作用，机组出力高歌猛进；但煤炭供给承压导致电煤价格节节攀升，如果电价上行空间不能放开，火电压力巨大，建议关注经营稳健的申能股份。核电运营情况持续向好、发展预期逐步兑现，推荐单核升级双核的中国核电、占据规模优势的中国广核（A）/中广核电力（H）。投资力度证明了水电的重要地位，推荐具备乌白注入预期、守正出奇的全球水电王者长江电力，两杨投产在即、水火共济的国投电力，以及进军西藏、西电东送大湾区的华能水电。

截至4 月9 日，环保板块当周下跌0.3%，跑赢沪深300 指数（下跌2.45%）2.14 个百分点，跑赢创业板指数（下跌2.42%）2.11个百分点。2021 年初至今，环保工程及服务板块整体指数表现较好，累计涨幅为5.75%，跑赢沪深300 指数9.13 个百分点。

Uninterrupted power supply (UPS) system is a power back up device. It offers systematic shutdown of electrical appliances. This study provides information on the usage of uninterrupted power supply (UPS) system in various end-use industries. The study is segmented on the basis of type (online, offline, and line interactive), rating (<5 KVA, 5-<50 50-200="" and="">200 KVA), end user (residential, industrial, and commercial), and region (North America, Europe, Asia-Pacific, and LAMEA). The study mostly deals with the usage of uninterrupted power supply (UPS) system mainly in large data center and telecommunication enduse industry. The study also includes in-depth information of top market players and their competitive analysis in the uninterrupted power supply (UPS) system industry.

碳达峰碳中和也是中国发展高层论坛 2021 年会上的热点话题，21 号的论坛上，国家发改委主任何立峰表示，我国正在制定 2030 年前碳达峰的行动方案。