The technological, economic, political, and social forces behind the energy transition have turned a number of natural phenomena into energy resources. Wind, solar radiation, geothermal heat, pore space, and brine water, to name a few of the famous examples, have in recent decades joined the ranks of coal, oil, and gas as sources of energy in the modern global economy. Among the many questions emerging as legal regimes develop for each of these new resources, is whether and what kinds of property interests a landowner may grant in any given resource apart from the land. Are landowners free to sever a separate estate in pore space, geothermal heat, wind, or sunshine, and what considerations are relevant in determining the answer to that question? This webinar explores the history and future of separate ownership of energy resources with a focus on the doctrinal and policy constraints and implications of making wind, solar radiation, geothermal heat, pore space, and other resources severable from land.