government could step in and give subsidies for this goal, assuming it were serious about decreasing GHG emissions.

that and government should actually step in firmer: laws for regulating companies to much limit ghg emissions. basically

Lobby governments: Without formal regulations requiring caps on emissions, it is unlikely that shipping companies will be incentivized to invest in costly solutions. Skysail could work with organisations like the Transport and Environment organisation to promote a change in transport regulations.

but companies' lobby for maintaining status quo, for max profit is strong...