在经历了一系列筹备工作后，清华大学云上暑期学校2021以及SDG马拉松挑战赛于6月28日正式启动。由两个颜值不错的00后副教授侯德义带领的师生团队主要负责可持续发展马拉松项目中的第二赛道：环境问题的可持续解决方案。其中来自全球环境人才培养项目的赵琦、张戈辉、孙若水、张翌晨、王淼、杨敬言、徐嘉欣7位同学组成了本赛道的学生运营团队。在过去的两天里，Hack2的同学在工作团队的协助下完成了破冰、问题提出、组成队伍等一系列环节，向完成可持续发展马拉松挑战赛迈出了坚实的第一步。
After weeks of preparations, the Tsinghua University SSG and SDG Hackathon program officially started on 28 June. A team of students and teachers from the School of Environment were mainly responsible for Hack2: Sustainable Solutions for Addressing Environmental Pollution in the SDG Hackathon. Over the past two days, the Hack2 students have completed a series of ice-breaking sessions, problem formulation and team formation with the assistance of the TA team, taking the first solid step towards completing the Hackathon.
6月28日晚是破冰环节，有着不同文化背景、不同学科背景的同学在破冰环节中表现积极。大家不仅踊跃地介绍自己，还提出了很多令人印象深刻的项目主题，覆盖了大部分环境领域热点方向，并和其他学科进行了很好的交叉融合；在各位同学的积极尝试和助教团队的引导下，已有多组同学成功组建自己的队伍，并开始了初步的主题探索。
The evening of 28 June was an ice-breaking session. Students with different cultural and academic backgrounds speak actively in the icebreaker session. Not only did they introduce themselves enthusiastically, they also came up with many impressive project themes, covering most of the hot areas in the environmental field and having good crossover with other disciplines; with the active attempts of all students and the guidance of the teaching assistant team, several groups of students have successfully formed their own teams.
29日晚的内容则主要分为两部分，首先是老师们的启发讲授环节。侯德义老师首先对可持续发展马拉松以及Hack2做了总览性介绍，包括马拉松活动的主题、目的、形式、日程安排以及考核方式等等。之后，李金惠老师和侯德义老师分别就构建零废弃物城市和应对土壤污染两个话题做主旨演讲，向学生们介绍了关于这两方面环境问题的基础知识背景，并帮助学术开阔思路、获得灵感。在讲授和问答环节结束后，老师们对学生勤于思考和提问的态度表达了肯定，同学们表示从讲座中受益匪浅。
The evening of 29 June was divided into two sessions, starting with lectures by the teachers. Prof. Hou, Deyi gave an overview of the SDG Hackathon and Hack2, including the theme, purpose, format, schedule and assessment methods of the Hackathon. Afterwards, Prof. Li, Jinhui and Prof. Hou, Deyi gave keynote speeches on the topics of building a zero-waste city and tackling soil pollution respectively, introducing the students to the background knowledge on these two environmental issues and helping to broaden their minds and ignite inspiration. At the end of the lectures and Q&A sessions, the teachers expressed their appreciation for the students' diligence in thinking and asking questions, while the students also said they had benefited a lot from the lectures.
6月29日晚的另外一部分内容是学生组队和小组讨论。在29日晚，各小组人员组成已初步成型，并在分工、主题选取、问题发现等工作上取得进展。
Another part of the evening of 29 June was devoted to team formation and group discussions. On the evening of the 29th, the team formation was basically finished and progress was made regarding work division, selection of topics and problem identification.
如，第7组的同学聚焦在“扩展的生产者责任在塑料饮料容器和循环经济中的作用”这一话题。队长蔡伯贤同学做了大量的准备工作，因此团队一开始就可以进入内容层面的讨论。为了更高效的工作，同学们还建立了微信群和Google Drive。助教孙若水密切跟进小组的讨论成果并提供了可能有用的数据库信息。
Group 7 focused on ‘Extended Producer Responsibility for Plastic Beverage Containers and Circular Economy’. Team leader Edward has done great preparation work and the team dived into the content quickly. For better communication, a WeChat group and a Google Drive were established for convenience. TA Ternence kept close track with their work and provided datasets they may need.
在第10组中，具有不同知识背景的同学们在短时间内通过搜集资料，查阅文献，做到了快速了解自己所感兴趣项目的，并能够将较广阔的研究范围聚焦到某一典型河流，一起探讨，队长Yi Lin在相关数据网站找到所需要的数据资料，组内同学各自发表观点看法，迅速搭建出研究框架，推进接下来的工作。
Students with different background knowledge got a general understanding of the theme they interested in in a short period of time by collecting information, literature. In addition, they quickly focused their broad research scope to a certain river, discussed together. Yi Lin, the team leader, found the required data on the relevant data websites. The students in the group expressed their opinions and quickly built the research framework and promote the following work.
在未来的7天中，各个小组仍需完成听取主题讲座、产生创意、阶段性汇报等一系列工作，并于7月5日迎来Hack2最终的方案展示。期待在未来看到各个小组的亮眼成果！
Over the next 7 days, the teamsareexpected to go through stages including keynote lectures, generating ideas as well as cross-pitch, and presenting their final proposals for Hack2 on 5 July. We look forward to seeing the teams' impressive results in the future!
