GenZero, which will be wholly owned by Temasek, aims to deploy capital in ventures that will help achieve net-zero greenhouse gas emissions by 2050

Keppel Offshore & Marine, one of the world's largest offshore oil rig builders, and Sembcorp Marine have suffered from a prolonged and severe sector downturn

The study, which is in line with the Singapore Green Plan, will go on until mid-2022, before the companies decide on their next move.