[20150401]R43787_Keystone XL管道：概述和最新发展.pdf

Keystone XL Pipeline: Overview and Recent Developments -name redacted- Specialist in Energy and Infrastructure Policy -name redacted- Analyst in Environmental Policy -name redacted- Analyst in Environmental Policy -name redacted- Specialist in Environmental Policy -name redacted- Legislative Attorney -name redacted- Specialist in Energy Economics -name redacted- Specialist in International Trade and Finance April 1, 2015 Congressional Research Service 7-. www.crs.gov R43787