Big polluters, concrete offsets? Swiss Airlines, Neustark ink carbon credit deal

SWISS CEO Jens Fehlinger (left) and Neustark founder and co-CEO Johannes Tiefenthaler (right). Credit: Swiss International Air Lines.
26 aug. 2025
13:59
Swiss airlines has invested in climate tech startup Neustark as part of a multi-year carbon removal agreement.

Its the latest in several such deals, where big polluters pay carbon capture providers to offset their emissions – giving startups early capital, and firms a quicker path to net-zero. But the approach remains controversial.

Swiss Airlines has signed a multi-year agreement to buy carbon removal credits from Neustark, a startup that locks carbon in concrete for “hundreds of thousands of years.”

Neustark said the agreement comes in the form of a “long-term investment” from the airline. This implies an offtake agreement, where a polluter pays a carbon capture provider for guaranteed removal of a set volume of CO2, often over multiple years.

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