Airbus SE said that one of its most ambitious projects for future propulsion — using hydrogen to power an aircraft — is progressing slower than planned because of the technological hurdles involved, dealing a setback to the industry’s efforts to clean up air travel.

Environmental groups argue hydrogen would still come at an environmental cost because of the energy used to produce it

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Airbus delays plans to fly a hydrogen-powered commercial aircraft by 2035, citing slower than expected advances in technology.

TotalEnergies SE and Air Liquide SA plan a €600 million ($628 million) joint venture to produce green hydrogen for the French oil giant’s refinery in the Netherlands, along with a supply deal for its petrochemical plant in Belgium.

French industrial gases company Air Liquide and French oil major TotalEnergies have partnered to invest in the development of two large-scale hydrogen production facilities in the Netherlands. These plants will utilise low-carbon technologies,

French industrial gases company Air Liquide on Tuesday announced a joint investment with French oil major TotalEnergies to develop two large-scale, low-carbon hydrogen production plants in the Netherlands.

TotalEnergies said on Tuesday it has signed agreements with Air Liquide to develop two projects for the production green hydrogen. Green hydrogen is hydrogen produced using renewable energy sources, such as wind or solar,

TotalEnergies (NYSE:TTE) has signed agreements with Air Liquide (OTCPK:AIQUF) to develop two projects in the Netherlands, for the production and delivery of some 45,000 tons a year of green hydrogen produced using renewable power,