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一 | BIRMINGHAM, Ala. -- An attorney for the mother of Alabama teen Natalee Holloway, who disappeared in Aruba, said a possible plea deal with a suspect in an extortion case is contingent upon his disclosing details about her death.Joran van der Sloot, long considered the chief suspect in Holloway's 2005 disappearance, is scheduled to appear in federal court Wednesday morning in Birmingham, Alabama, for a plea and sentencing hearing for a case in which he is accused of trying to extort $250,000 from Holloway's mother in 2010 to reveal the location of her body. John Q. Kelly, an attorney who represented Holloway's mother during the alleged extortion, told The Associated Press Tuesday that a potential plea deal is contingent upon him revealing information about what happened to Holloway. Kelly first made the comments on NBC's “Today” show. Emails sent to van der Sloot’s attorney and a spokeswoman for federal prosecutors were not immediately returned.Holloway's family has long sought answers about her disappearance. But those answers have proven elusive. Van der Sloot has given a variety of conflicting descriptions over the years about what happened, which would likely put raised scrutiny on any new account. Her family is expected to be in court Wednesday.Holloway went missing during a high school graduation trip with classmates to Aruba. The Alabama teen was last seen leaving a bar with van der Sloot, a student at an international school. The mysterious disappearance sparked years of news coverage and true-crime podcasts, books and movies. Van der Sloot was identified as a main suspect and was detained for questioning but no charges were filed in the case.A judge declared Holloway dead but her body has never been found. Prosecutors in the Alabama case said van der Sloot contacted Kelly in 2010 and asked for $250,000 from Beth Holloway to reveal the location of her daughter's remains. He later agreed to accept $25,000 to disclose the location, and asked for the other $225,000 once the remains were recovered. Van der Sloot said that Holloway was buried in the gravel under the foundation of a house, but later admitted that was untrue, FBI Agent William K. Bryan wrote in a 2010 sworn statement filed in the case. Van der Sloot moved from Aruba to Peru before he could be arrested in the extortion case. Van der Sloot was extradited to Alabama earlier this year from Peru, where he’s serving a 28-year sentence after confessing to killing a Peruvian woman in 2010. Peru’s government allowed van der Sloot’s temporary extradition to the U.S. to face charges there. Under a 2001 treaty between the countries, a suspect can be temporarily extradited to face trial in the other country, but must “be returned” after judicial proceedings are concluded.。清晨5点，滨江区西兴路还沉浸在微凉晨色中。洒水车司机冯水良拧开阀门，细密水雾均匀覆在柏油路上，既湿润了空气，也压下了扬尘。和往常不同的是，这一车“解渴水”并非取自自来水管网，而是来自几百米外的建设河——经净化处理后，它成了环卫作业的“第二水源”。这是杭州推进环卫用水“换血”的日常缩影。

二 | 今年以来，杭州持续调整环卫作业用水结构，用河道净化水、再生水替代自来水，把水资源节约集约利用落到每辆环卫车上。市城管部门的最新数据显示：今年上半年，全市环卫作业总用水量达507万吨，其中河道取水160万吨、再生水取水70万吨，“第二水源”合计占比45.37%。“以前装一车水，用的都是自来水。去年12月滨江新增10个河道取水口后，我们的‘水缸’直接搬到了河边。”开了8年洒水车的冯水良说，现在出车前顺路就能完成补水，方便又省心。截至目前，全市已累计布设河道取水口104个、再生水取水栓23个，一张覆盖城区的环卫“第二水源”补给网正越织越密。有人疑惑：用河水、再生水洗路，会不会影响保洁质量？答案藏在精细化“分质供水”方案里：洒水车出水口径大、自带粗滤装置，日均耗水量高，优先取用净化河道水和再生水；高压洗扫车喷头精密，选用悬浮物更低的再生水，减少设备堵塞磨损；雾炮车对水质要求更高，仍采用自来水。

三 | 与此同时，养护人员会定期清洗更换取水滤网、疏通管路、检修高压喷头和水泵核心部件，让每一辆环卫车都“喝得顺、跑得稳”。节水更要算好经济账。经多轮实测，当取水半径控制在3公里以内时，综合用水成本明显低于自来水，也不会挤占正常保洁作业时间。如今，各保洁单位都会提前摸排就近河道取水点和再生水桩位置，提前规划作业路线，尽量不让车辆空驶找水。