621. Methane Emission Controls: Redesigning EPA Regulations for Greater Efficacy
- Author:
- Robert Kleinberg
- Publication Date:
- 10-2021
- Content Type:
- Commentary and Analysis
- Institution:
- Center on Global Energy Policy (CGEP), Columbia University
- Abstract:
- Natural gas holds a critical role in the US energy economy, providing 32 percent of primary energy evenly distributed among electric power generation, industrial use, and residential and commercial consumption (LLNL 2020). As countries set targets to minimize climate change, however, widespread reliance on fossil fuels, with their attendant greenhouse gas emissions, is being scrutinized. Methane, the main constituent of natural gas, is second only to carbon dioxide in its contribution to greenhouse gas warming (Kleinberg 2020). It holds the potential to be a primary driver of global average temperature change between now and 2050—no matter what progress is made in controlling increases of atmospheric carbon dioxide over the next thirty years (Shindell et al. 2012). Half of global methane emissions come from natural sources, such as swamps and seeps, and half from anthropogenic sources, such as agriculture and fossil fuels. Regulations curbing methane emissions from the oil and gas industry are essential to mitigating global climate change over the next three decades. In the United States, current regulations were devised at a time when the technology for the measurement of natural gas emissions was relatively immature. Comprehensive performance-based regulations were not an option, and because of this, many regulations put in place were highly prescriptive. Data show these regulations have been largely ineffective. This commentary examines the potential to reduce emissions of methane from oil and natural gas infrastructure. It begins with a brief history of natural gas regulations and the effectiveness of rulemaking, before exploring unregulated and underregulated sources of methane. This is followed by a discussion about improvements in measurement capabilities and how regulations could be used to more effectively address methane emissions. This work shows the complexities of oil and gas production do not lend themselves to prescriptive regulation. Performance-based regulation, including quantitative compliance monitoring, would engage the talents of thousands of engineers, encouraging them to solve problems using locally appropriate solutions rather than relying on a prescriptive checklist approach that cannot anticipate every eventuality. The key to performance-based regulation is accurate measurement, and this capability has improved rapidly in recent years. Aircraft-based, facility-scale measurements encompassing tens of thousands of facilities spread over tens of thousands of square kilometers are economically viable and increasingly common. Permanently installed continuously monitoring sensors show promise in detecting intermittent sources; oil field pilot studies are underway. However, aircraft- and ground-based facility-scale measurements are not compliant with the current regulatory regime, which focuses on individual components. Therefore, the current regulatory regime must be completely rethought. (A comprehensive exposition of this topic, with evidentiary support, has been submitted to the Environmental Protection Agency [Kleinberg 2021b].)
- Topic:
- Economics, Energy Policy, Natural Resources, Gas, and Methane
- Political Geography:
- North America and United States of America