In recent years the role of transport infrastructure in energy markets has become a flashpoint for legal conflict. On one hand, the world is experiencing an unprecedented build-out all kinds of energy transport: oil and gas pipelines, liquefied natural gas projects, power transmission, and port facilities for coal and oil. On the other hand, environmental advocates have increasingly insisted that pipelines and other transport projects should not be built if they would encourage fossil fuel production in markets “upstream” and fossil fuel consumption in markets “downstream” of these projects. Governments have struggled with how to respond. President Obama famously promised to assess the upstream emissions from the Keystone XL pipeline but th...