This article explores three areas in which globalization is profoundly affecting the development of a global environmental law. First, countries increasingly are borrowing law and regulatory innovations from one another to respond to common environmental problems. Although this is not an entirely new phenomenon, it is occurring at an unprecedented pace. Second, lawsuits seeking to hold companies liable for environmental harm they have caused outside their home countries are raising new questions concerning the appropriate venue for such transnational liability litigation and the standards courts should apply for enforcement of foreign judgments. Third, nongovernmental organizations are playing an increasingly important role in influencing corporate behavior by promoting greater informational disclosure and transparency to mobilize informed consumers.