TY - JOUR ID - discovery10063871 N1 - This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article?s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ SN - 1095-9203 EP - 835 JF - Science AV - public VL - 347 SP - 834 UR - https://doi.org/10.1126/science.347.6224.834-d KW - Science & Technology KW - Multidisciplinary Sciences KW - Science & Technology - Other Topics KW - POLLUTION KW - LAW TI - Enforcement key to China's environment IS - 6224 A1 - Yang, H A1 - Huang, X A1 - Thompson, JR A1 - Flower, RJ Y1 - 2015/02/20/ PB - AMER ASSOC ADVANCEMENT SCIENCE ER -