Geoengineering climate change

Reader response: Opponents of geoengineering misunderstand humanity’s choices

"Without some kind of prompt geoengineering action, climate change will accelerate the damage we are already seeing."

Editor's note: This letter to the editor is in response to EHN's June 10 story Solar geoengineering: Scientists decry a 'foolish' idea.


In recent months, the popular and "soft" scientific media have carried numerous articles opposing research on climate-related geoengineering designed to ameliorate climate disruption. These articles build on a mistaken premise, sometimes explicit and often implicit, that geoengineering strategies are an unnecessary alternative and an excuse to avoid ending fossil fuel use.

Most informed advocates for geoengineering research agree that ending fossil fuel use and associated emissions before 2050 is an urgent necessity to prevent the desolation of Earth as a habitable planet for all life. There is no doubt that a "business as usual" fossil-fuel-based economy will destroy us all.

Geoengineering research opponents ignore the fact that even ending all fossil fuel use tomorrow would still leave the carbon already in the atmosphere, which will continue to cause enormous climate-related harm during at least the next several decades.

The most under-appreciated aspect of the IPCC's January 2019 Report on Global Warming of 1.5C is that even if all emissions decline according to the IPCC's optimistic timeline, global warming will not be limited to 1.5 degrees C. On the contrary, the report projects that Earth's temperature will likely rise well above 1.5 degrees C and remain there for several decades as it slowly declines to 1.5 degrees C by 2100.

Here is the IPCC's key summary figure below. Look closely at the period between 2030 and 2080. Likely temperature levels are above the 2100 target throughout most of this period – our entire lifetimes.

Moreover, we now know that crucial emissions of methane and other non-CO2 gasses have far exceeded the IPCC's target levels for them in the years since the 2017 baseline. And we have every reason to believe these emissions will continue to exceed the IPCC suppositions long past 2030.

Bloomberg Green, like the IPCC, sugar-coats its commentary:

In principle, the goal is simple: Roll this number [carbon emissions] downward by phasing-out emissions until reaching zero. In practice, however, this number continues to rise. Global CO2 emissions from fossil fuels stopped growing from 2014-2016, . . . Increases resumed since then, despite a temporary drop-off during 2020 pandemic quarantines. These emissions need to fall to half their 2010 level by 2030 to keep alive the Paris Agreement goal of limiting warming to below 1.5°C.

There's some help on the way. Dozens of countries, including nine of the 10 largest economies have pledged to zero-out emissions by mid-century. . . . No collective task has ever been more difficult.

Geoengineering needed to stop climate change destruction 

The hard reality is that without some kind of prompt geoengineering action, climate change will accelerate the damage we are already seeing: disappearing glaciers and polar icecaps, droughts, extreme flooding, hurricanes, massive forest fires, and destruction of coral reefs and fisheries, food insecurity, and species extinction.

Together these events will cause more mass migrations, ethnic genocides, and frequent civil and international wars, which in turn could cause irreversible damage to human civilization and most life on the planet. U.S. government agencies, including reports by the U.S. Global Change Research Program and testimony by the former Director of National Intelligence, already foresee multiple, serious threats that shape their view of the future.

Geoengineering research might demonstrate that proposed geoengineering projects cannot achieve their aims without unacceptable risks and damage. But only more scientific and engineering research can answer those questions. Humanity must pursue every possible means of minimizing the foreseeable climate disruption of the coming half-century. The alternative is passivity in the face of an incredible amount of human and animal suffering during the coming decades.

Pursuing geoengineering research might also weaken some world leaders' sense of urgency about decarbonization, but that is a questionable hypothesis. Climate-related damage will increase visibly during the coming decades, and the public clamor for action will inevitably increase along with it.

Even if the IPCC's timeline for ending fossil fuel emissions is achievable, by 2100 the disintegration of what we think of as modern civilization could be so great that it won't matter exactly when we succeed in ending fossil fuel use. Much of what we hope to preserve will have been swept away by then.

Sam Bleicher is an Adjunct Professor Georgetown University Law School and author of two "climate future" novels: THE PLOT TO COOL THE PLANET, A Novel, and GUARDIANS OF THE SOLAR SHIELD: EARTH'S CLIMATE MIRRORS UNDER ATTACK 2029-37.

Banner photo credit: redcharlie/Unsplash

Senator Whitehouse & climate change

Senator Whitehouse puts climate change on budget committee’s agenda

For more than a decade, Senator Sheldon Whitehouse gave daily warnings about the mounting threat of climate change. Now he has a powerful new perch.
Amid LNG’s Gulf Coast expansion, community hopes to stand in its way
Coast Guard inspects Cameron LNG Facility in preparation for first LNG export in 2019. (Credit: Coast Guard News)

Amid LNG’s Gulf Coast expansion, community hopes to stand in its way

This 2-part series was co-produced by Environmental Health News and the journalism non-profit Economic Hardship Reporting Project. See part 1 here.Este ensayo también está disponible en español
Keep reading...Show less
vermont farmers flood risks
Credit: Nicholas Erwin/Flickr

Vermont farmers face uncertain future amid increased flood risks

Vermont farmers, reeling from last summer’s devastating floods, now face an uncertain future as persistent rains continue to threaten their livelihoods.

Sarah Mearhoff reports for VTDigger.

Keep reading...Show less

Hurricane Beryl leaves millions of Texans without power amid soaring heat

Millions of Texans face a third day without power as Hurricane Beryl's aftermath coincides with dangerously high temperatures.

Pooja Salhotra, Emily Foxhall, and Alejandra Martinez report for The Texas Tribune.

Keep reading...Show less

Tim Dunn, evangelical oil magnate, aims to boost Trump’s campaign

Billionaire Tim Dunn, a Texas oil mogul, is using his wealth to support Donald Trump's bid for the White House, reflecting his desire to influence national politics with his religious and conservative values.

Mike Soraghan reports for E&E News.

Keep reading...Show less

Citizen scientists map New Hampshire’s beaches

Citizen scientists have spent six years helping to track the changes in New Hampshire's coastline, providing crucial data on how different beaches respond to weather events.

Claire Sullivan reports for New Hampshire Bulletin.

Keep reading...Show less

Texas’ new appellate court raises concerns for environmentalists

Texas Governor Greg Abbott's recent creation of the 15th Court of Appeals, a body seen as favorable to business interests, has sparked fears among environmental advocates who believe it undermines regulatory oversight.

Jim Morris, Leah Clark and Manuela Silva report for Public Health Watch.

Keep reading...Show less
From our Newsroom
WATCH: Enduring the “endless” expansion of the nation’s petrochemical corridor

WATCH: Enduring the “endless” expansion of the nation’s petrochemical corridor

As mounds of dredged material from the Houston Ship Channel dot their neighborhoods, residents are left without answers as to what dangers could be lurking.

US Steel pollution

Nippon Steel shareholders demand environmental accountability in light of pending U.S. Steel acquisition

“It’s a little ironic that they’re coming to the U.S. and buying a company facing all the same problems they’re facing in Japan.”

Another chemical recycling plant closure offers ‘flashing red light’ to nascent industry

Another chemical recycling plant closure offers ‘flashing red light’ to nascent industry

Fulcrum BioFuels’ shuttered “sustainable aviation fuel” plant is the latest facility to run into technical and financial challenges.

nurses climate change

Op-ed: In a warming world, nurses heal people and the planet

Nurses have the experience, motivation and public support to make an important contribution in tackling the climate crises.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.