Over the past few years, interest in bioenergy has boomed with higher oil prices and concerns about energy security, farm incomes, and mitigation of climate change. In the same time, there is significant interest in international agricultural and forestry based greenhouse gas (GHG) mitigation. However, bioenergy and climate policies are being formulated largely independent of one another. Understanding the interaction between these potentially competing policy objectives is valuable for identifying possible constraints that one policy might be placing on the other, as well as potential complementarities. Using a general equilibrium framework, this study assesses the effects of bioenergy expansion on sectoral, regional and global GHG emissions mitigation potential.