Cutting carbon capture costs remain key hurdle for greening shipping fuels

Sucking carbon out of the air, and then using it to make net-zero fuels for shipping, is an appealing solution as the industry faces pressure to slash greenhouse gas emissions.

But despite the threat they represent to the climate, CO₂ molecules make up a tiny percentage of the atmosphere, so to use direct air capture (DAC) technology to tease out carbon requires sifting a lot of air — and spending a lot of money.