Controversial carbon capture plans in west Cornwall have been scrapped, it has been confirmed.
The Planetary Technologies team wanted to release magnesium hydroxide into St Ives Bay and monitor how the chemical affected ocean acidity and carbon dioxide levels.
However, some people opposed the idea and the impact on wildlife and the environment.
On Wednesday, the company said the "scale-up of operations in Cornwall has been assessed as commercially unviable and we will not be pursuing a wider programme in the region."

The Planetary Technology team from Canada wanted to release Magnesium Hydroxide into St Ives Bay
>> In Other News: CO280 Signs Landmark 3.69 Million Tonne Agreement with Microsoft to Scale-up Carbon Dioxide Removal in the US Pulp and Paper Industry
On the company's website it said: "We worked with local utility South West Water and proposed the addition of a diluted form of the mineral magnesium hydroxide to the existing water flow at the water treatment plant in Hayle.
The company said adding the alkaline compound to the sea would help counter ocean acidity caused by climate change.
It said: "Planetary has successfully completed its trial operations in Cornwall, UK, gathering valuable scientific data and insights.
"Although the trial demonstrated great potential, we have decided not to pursue a full programme in Cornwall due to commercial infeasibility."
A spokesperson for Planetary Technologies added: "Cornwall has played a meaningful role in our development, and we are deeply grateful to the local partners, community, and team members who have supported our mission."
St Ives MP Andrew George said "more research and robust studies" needed to be carried out before chemicals were released into the environment.
He said: "There remained uncertainty regarding the potential impact of pumping these chemicals on marine wildlife.
"The studies undertaken had not satisfied the Cornwall Carbon Scrutiny Group, in that the baseline data remained incomplete, the control and diffuser sites weren't comparable and the target study species were not present at the time of the trials."
George said the decision was "good common sense for Cornwall, seals, safe seas and local economy".
Follow the money flow of climate, technology, and energy investments to uncover new opportunities and jobs.
Inside This Issue 🚪 Honda Exits Fuel Cell Partnership as Hydrogen Pivots ♻️ A Breakthrough That Turns Exhaust CO2 Into Useful Materials ✈️ FedEx Takes Delivery of SAF at Dallas Fort Worth and New ...
Inside This Issue 🔍 QIMC Hits 5,558 ppm Hydrogen in Nova Scotia Discovery 🏗️ Haffner Energy Launches the C-iC Modular Units Line to Unlock Financing for Mid-Sized Biofuel Projects 🌱 CF Industries,...
Inside This Issue 💰 Congress Preserves Carbon Management Funding in FY26 Bill Heading to Trump's Desk 🧪 HYCO1 Announces Three U.S. Patents Powering the Most Advanced Syngas Production Platform Thr...
FedEx Takes Delivery of SAF at Dallas Fort Worth and New York–JFK International Airports
In 2025, FedEx deployed blended SAF for the first time at five major U.S. airports. MEMPHIS, Tenn., Jan. 29, 2026 – FedEx introduced sustainable aviation fuel (SAF) at two more U.S. airports towar...
Air Products (NYSE: APD), the world’s leading supplier of hydrogen, today announced that it was recently awarded supply contracts from the National Aeronautics and Space Administration (NASA) total...
Green Ammonia Demonstration Plant of JGC Begins Producing Ammonia Using Hydrogen From Asahi Kasei
Asahi Kasei Corp. is pleased to announce that a demonstration plant1 utilizing green ammonia production technology of JGC Holdings Corporation (JGC) began producing ammonia in January 2026, using h...
A Breakthrough That Turns Exhaust CO2 Into Useful Materials
Summary: Scientists have created a device that captures carbon dioxide and transforms it into a useful chemical in a single step. The new electrode works with realistic exhaust gases rather than re...
Follow the money flow of climate, technology, and energy investments to uncover new opportunities and jobs.