Energy ministers and government officials from around 20 countries said Tuesday they will step up cooperation in promoting the use of hydrogen as an alternative energy source by sharing technology and standards.

In the first Hydrogen Energy Ministerial Meeting held in Tokyo, the participants also stressed the need to jointly analyze the effectiveness of hydrogen use in reducing carbon dioxide emissions as the world grapples with climate change.

Despite growing hopes for hydrogen as an alternative energy source to fossil fuel, it faces a host of challenges, such as high costs and a lack of necessary infrastructure.