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美天然气井爆炸恐污染土壤与地下水

美国宾州天然气井发生爆炸。这个天然气井采用水力压裂法(hydraulic fracturing or “fracking” method),居民担心爆炸事件会影响环境,因为有数千加仑含毒的化学钻井液(chemical-filled drilling fluid)渗入当地的土壤与地下水中。
http://www.reuters.com/article/2011/04/21/us-chesapeake-blowout-people-idUSTRE73K7SE20110421.feedType=RSS&feedName=environmentNews&ca=samsung&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+reuters%2Fenvironment+%28News+%2F+US+%2F+Environment%29
http://www.france24.com/en/20110422-us-gas-well-contained-but-concerns-rise-fracking
http://www.upi.com/Top_News/US/2011/04/22/Fracking-fluid-leak-stops-at-Pa-gas-well/UPI-74271303506292/

美乳牛场使用过量抗生素恐增抗药性疾病

美国食品与药物管理局(US Food and Drug Administration)警告叁个州的酪农场,不要过度使用动物抗生素,因其残留量可能有害人类健康,并增加更广泛的抗生素耐药性感染。
http://www.foodsafetynews.com/2011/04/animal-antibiotic-drug-abuse-at-dairies-in-three-states/
http://www.premierfoodsafety.com/news/foodsafetyheadlines