This report focuses on selected environmental concerns raised in conjunction with the proposed pipeline and the oil sands crude it will transport. As such, the environmental issues discussed in this report do not represent an exhaustive list of concerns and issues. Moreover, many of the environmental concerns are not unique to oil sands. One could compose analogous lists for all forms of energy: coal, natural gas, nuclear, biofuels, conventional crude oil. Therefore, the oil sands/pipeline issues discussed in this report, when practicable, will be compared to other energy sources, particularly conventional crude oil development.