greenhouse gases

GOP may finally succeed in unrelenting quest to kill two NASA climate satellites

climate change, Donald Trump, Earth science, greenhouse gases, NASA, nasa budget, orbiting carbon observatory, Science, Space, space policy / DJ Henderson / September 6, 2025

Before satellite measurements, researchers relied on estimates and data from a smattering of air and ground-based sensors. An instrument on Mauna Loa, Hawaii, with the longest record of direct carbon dioxide measurements, is also slated for shutdown under Trump’s budget.

It requires a sustained, consistent dataset to recognize trends. That’s why, for example, the US government has funded a series of Landsat satellites since 1972 to create an uninterrupted data catalog illustrating changes in global land use.

But NASA is now poised to shut off OCO-2 and OCO-3 instead of thinking about how to replace them when they inevitably cease working. The missions are now operating beyond their original design lives, but scientists say both instruments are in good health.

Can anyone replace NASA?

Research institutes in Japan, China, and Europe have launched their own greenhouse gas-monitoring satellites. So far, all of them lack the spatial resolution of the OCO instruments, meaning they can’t identify emission sources with the same precision as the US missions. A new European mission called CO2M will come closest to replicating OCO-2 and OCO-3, but it won’t launch until 2027.

Several private groups have launched their own satellites to measure atmospheric chemicals, but these have primarily focused on detecting localized methane emissions for regulatory purposes, and not on global trends.

One of the newer groups in this sector, known as the Carbon Mapper Coalition, launched its first small satellite last year. This nonprofit consortium includes contributors from JPL, the same lab that spawned the OCO instruments, as well as Planet Labs, the California Air Resources Board, universities, and private investment funds.

Government leaders in Montgomery County, Maryland, have set a goal of reducing greenhouse gas emissions by 80 percent by 2027, and 100 percent by 2035. Mark Elrich, the Democratic county executive, said the pending termination of NASA’s carbon-monitoring missions “weakens our ability to hold polluters accountable.”

“This decision would … wipe out years of research that helps us understand greenhouse gas emissions, plant health, and the forces that are driving climate change,” Elrich said in a press conference last month.

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EPA plans to ignore science, stop regulating greenhouse gases

clean air act, CO2, EPA, greenhouse gases, Policy, Science, syndication / Beth Washington / July 30, 2025

It derives from a 2007 Supreme Court ruling that named greenhouse gases as “air pollutants,” giving the EPA the mandate to regulate them under the Clean Air Act.

Critics of the rule say that the Clean Air Act was fashioned to manage localized emissions, not those responsible for global climate change.

A rollback would automatically weaken the greenhouse gas emissions standards for cars and heavy-duty vehicles. Manufacturers such as Daimler and Volvo Cars have previously opposed the EPA’s efforts to tighten emission standards, while organized labour groups such as the American Trucking Association said they “put the trucking industry on a path to economic ruin.”

However, Katherine García, director of Sierra Club’s Clean Transportation for All Campaign, said that the ruling would be “disastrous for curbing toxic truck pollution, especially in frontline communities disproportionately burdened by diesel exhaust.”

Energy experts said the move could also stall progress on developing clean energy sources such as nuclear power.

“Bipartisan support for nuclear largely rests on the fact that it doesn’t have carbon emissions,” said Ken Irvin, a partner in Sidley Austin’s global energy and infrastructure practice. “If carbon stops being considered to endanger human welfare, that might take away momentum from nuclear.”

The proposed rule from the EPA will go through a public comment period and inter-agency review. It is likely to face legal challenges from environmental activists.

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