Exploring the potential of green hydrogen to rejuvenate oceanic dead zones

In an innovative approach to tackling oceanic dead zones, Douglas Wallace contemplates using the oxygen by-product from green hydrogen production to revive these lifeless marine areas.

Brian Owens reports for Hakai Magazine.


In short:

  • Douglas Wallace's research explores using surplus oxygen from hydrogen production to address the low-oxygen zones threatening marine diversity.
  • The proposed World Energy GH2 project in Stephenville could produce sufficient oxygen to mitigate the Gulf of St. Lawrence's dead zone.
  • The feasibility of this oxygenation plan hinges on overcoming significant engineering and environmental challenges, alongside the uncertain future of hydrogen fuel markets.

Key quote:

“About 15 percent of the deeper parts of the Gulf of St. Lawrence are getting close to the threshold where a lot of marine animals will struggle to live.”

— Douglas Wallace, oceanographer at Dalhousie University

Why this matters:

During the electrolysis process used to create green hydrogen, oxygen is produced as a by-product. Instead of letting this precious oxygen go to waste, researchers and environmentalists are exploring innovative ways to harness it to breathe new life into depleted marine ecosystems.

Oxygen-depleted "dead zones," caused by stagnating circulation and algal blooms, have ballooned in the Gulf of Mexico and the Pacific Northwest.

A row of wind turbines at dusk installed on rolling hills

Largest US renewable project begins generating electricity

SunZia has quietly begun sending enormous amounts of wind power to California as President Donald Trump works to thwart the wind industry.

A solar panel installed on a pole imprinted with the Cuban flag

As Cuba’s grid fails, solar power becomes a lifeline

The Trump administration’s fuel blockade against Cuba has resulted in widespread power outages and gas shortages, but also a surge in solar installations.

A sunny balcony with a bench and flower pots

What to know before you get balcony solar

States are starting to embrace plug-and-play solar. Get up to speed on the cost, payback, and safety bona fides of the systems before they hit shelves near you.

An offshore oil rig with the sunrise in the background

Environmental groups take Trump administration’s ‘God Squad’ to court

Environmental groups are suing the Trump administration over its decision to exempt oil and gas drilling in the Gulf of Mexico from complying with the Endangered Species Act.

A wooden judge's gavel on a wooden desk

Court rejects Trump administration climate lawsuit against Hawaii

In a setback for federal efforts to thwart climate litigation, the judge ruled that the suit, which tried to block the state from suing oil companies, was too speculative.
Flags of the EU flying outside a glass and steel building

Hungary's carbon tax violates EU rules, top court says

The European Union's top court says Hungary's tax on CO2 emission allowances, introduced in 2023, is against EU law, as it removes the operators' incentive to invest in measures to cut emissions.

A mountain highway winding through a forest toward mountains in the background
Credit: Hans/Unsplash+

How ‘national security’ became the new justification for drilling

What’s happening to the public lands and oceans we thought were protected?
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

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