美环保署长访台寻双方环保合作 北京不满 (US EPA Chief visits Taiwan, Beijing displeased) South China Morning Post, April 16, 2014 http://www.nanzao.com/sc/hk/25225/mei-huan-bao-shu-chang-fang-tai-xun-shuang-fang-huan-bao-he-zuo-bei-jing-bu-man