According to United States Climate Envoy John Kerry, the U.S. will work with other governments to increase efforts to make nuclear fusion a new source of carbon-free energy.

Kerry made the announcement Tuesday, while in Dubai for U.N. climate talks.

Nuclear fusion melds two hydrogen atoms together to produce a helium atom and a large amount of energy.

Many experts say that, at best, functional fusion technology is still several years away.

But if achieved, it could be a significant solution to climate change, which is caused largely by the burning of fossil fuels such as oil, gas and coal, leaking natural gas and some livestock practices.

Globally, there are over 40 fusion companies right now.

Shifting to renewable energy is a major issue at the ongoing COP28 climate summit.

Some leaders have voiced support for a target of tripling renewable energy worldwide in any final agreement while stemming use of coal, oil and natural gas.