NHK has learned that Japan, the United States and Singapore have joined forces to promote sustainable aviation fuel to cut CO2 emissions.
The three nations are participating in an international event in the United Arab Emirates.
The International Civil Aviation Organization is hosting a meeting in Dubai to discuss ways for international flights to achieve net-zero carbon emissions by 2050.
The three countries are expected to unveil their "green lane" initiative to push the use of sustainable aviation fuel, or SAF. The new eco-fuel is made from waste oil and plants.
The initiative would officially certify eco-friendly flights and airports could prioritize aircraft using the fuel for parking spots.
The three-nation team also aims to spark investment into companies that produce SAF.