Japanese and Thai firms have teamed up to try and cut Thailand's coal emissions. They aim to use fuel at a power plant that's mixed with ammonia, which does not produce carbon dioxide when burned.

Energy-related companies from the two countries signed an agreement in Bangkok.

They include Japan's largest electricity producer, Jera, and trading house Mitsubishi Corporation.

If the project makes it past research to the business stage, it would be the first instance of energy produced with mixed ammonia in Thailand.

Countries in Southeast Asia are highly dependent on coal and natural gas for power generation. It is hoped that ammonia could help meet Thailand's growing energy needs while reducing coal's environmental impact.