Technical

The following articles are related to the science and technology behind Methane Action policy proposals.

First-Ever Environmental Impact Study for a Methane Removal Approach Published in the Journal Sustainability

First-Ever Environmental Impact Study for a Methane Removal Approach Published in the Journal Sustainability

Methane Action announced publication of a first-ever environmental impact modeling study of the potential methane removal technique known as Enhanced Atmospheric Methane Oxidation (EAMO). EAMO aims at oxidizing methane in the atmosphere and could potentially be used to lower dangerously high and rapidly rising methane levels. The study was published in the peer-reviewed science journal Sustainability: “Environmental Impact Modeling for a Small-Scale Field Test of Methane Removal by Iron Salt Aerosols”. The model addresses a hypothetical small-scale test of EAMO in the southern Caribbean, where a single cargo ship would inject iron salt aerosols into its exhaust plume with the ...
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Stop sign with CH4 instead of "Stop" superimposed over a photo of clouds in the sky.

Catalogue of Research Funding Needs to Advance Methane Removal

In complement to anthropogenic methane emissions reductions, atmospheric methane removal has been proposed in order to: address methane sources difficult to prevent or avoid, deal with legacy emissions, remove increasing emissions from wetlands and water bodies induced by anthropogenic global warming, and prepare in case of a methane burst (rapidly thawing permafrost and catastrophic releases from submarine methane hydrates). Read more in the embedded document below ...
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A bridge that has collapsed. It goes out over the water and the stops.

VIDEO: How Best to Reduce Methane: A New York State Example

Bob Howarth, Phd of Cornell University discusses the importance of methane emissions reduction in relation to New York State's goal of converting to 100% renewable energy sources by 2050. Professor Howarth emphasizes why "natural gas" is not a "bridge fuel to the future" and why it is important to phase out methane as opposed to fixing leaks in production and distribution systems. Also discussed are the drawbacks to "grey" and "blue" hydrogen (hydrogen derived from natural gas) ...
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Sky with feathery clouds at sunset over ocean.

In ScienceDirect: Perspectives on removal of atmospheric methane

This article reviews proposed methods for atmospheric methane removal at a climatically significant scale. These methods include enhancement of natural hydroxyl and chlorine sinks, photocatalysis in solar updraft towers, zeolite catalyst in direct air capture devices, and methanotrophic bacteria. Though these are still at an early stage of development, a comparison is provided with some carbon dioxide removal methods in terms of expected costs. The cheapest method is potentially enhancement of the chlorine natural sink, costing as little as $1.6 per ton CO2-eq. Read the full article in ScienceDirect ...
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Evening sky with stars, with The Royal Society logo superimposed

In The Royal Society Publishing: Methane removal and the proportional reductions in surface temperature and ozone

Abstract Mitigating climate change requires a diverse portfolio of technologies and approaches, including negative emissions or removal of greenhouse gases. Previous literature focuses primarily on carbon dioxide removal, but methane removal may be an important complement to future efforts. Methane removal has at least two key benefits: reducing temperature more rapidly than carbon dioxide removal and improving air quality by reducing surface ozone concentration. While some removal technologies are being developed, modelling of their impacts is limited. Here, we conduct the first simulations using a methane emissions-driven Earth System Model to quantify the climate and air quality co-benefits of methane ...
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A sculpture of a Methane Molecule next to a freeway in Northern Germany with The Royal Society Publishing logo superimposed.

In The Royal Society Publishing: Atmospheric methane removal: a research agenda

Abstract Atmospheric methane removal (e.g. in situ methane oxidation to carbon dioxide) may be needed to offset continued methane release and limit the global warming contribution of this potent greenhouse gas. Because mitigating most anthropogenic emissions of methane is uncertain this century, and sudden methane releases from the Arctic or elsewhere cannot be excluded, technologies for methane removal or oxidation may be required. Carbon dioxide removal has an increasingly well-established research agenda and technological foundation. No similar framework exists for methane removal. We believe that a research agenda for negative methane emissions—‘removal' or atmospheric methane oxidation—is needed. We outline some ...
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A flame from a "natural gas" stove burner.

Methane Action Comments on EPA Methane Rule

Comments of Methane Action and Remineralize the Earth in response to the U.S. Environmental Protection Agency's solicitation of public input on the Agency’s efforts to reduce emissions of methane and other air pollutants from the oil and natural gas sector ...
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Microscopic view of a phytoplankton with the ScienceDirect logo superimposed.

In ScienceDirect: A nature-based negative emissions technology able to remove atmospheric methane and other greenhouse gases

Abstract Fulfilling the Paris Climate Agreement requires reducing rapidly the new emissions of greenhouse gases (GHGs) to reach net zero by 2050. As some anthropogenic emissions cannot be zero, to compensate them it will be necessary to remove GHGs from the atmosphere. Among possible methods, the Iron Salt Aerosol (ISA) offers new possibilities, including removal of methane and several other GHGs, as well as carbon dioxide. Several studies suggest that anthropogenic emissions of iron participate in the current primary productivity. As plans to decarbonize the world economy might also have inadvertent warming effects due to the reduction of iron emissions ...
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