The gaps between what law demands and what science supplies in environmental policy reflect the disparate objectives and epistemological approaches of the two fields. While existing scholarship has begun illuminating the causes and consequences of the data gaps, progress in bridging the divide requires a better understanding of how gaps differ across the full spectrum of environmental law.  This essay probes the variations in information policy challenges that arise from different types of environmental law. Science information policy serves as a prism for disaggregating environmental law into component parts.