DAVOS, Switzerland (AP) -- Pharrell Williams says he'll have all of humanity singing together at a worldwide concert June 18 to fight global warming.

Former Vice President Al Gore, left, and US singer Pharrell Williams, right, enjoy the view on the roof top of the Congress Center where the World Economic Forum takes place in Davos, Switzerland (AP Photo/Michel Euler)

The pop superstar is teaming with Nobel Peace Prize-winner Al Gore to produce a "Live Earth" concert on seven continents to build support for a U.N. climate pact in Paris among more than 190 nations in December.

On a stage Wednesday at the World Economic Forum in Davos with producer Kevin Wall, Williams said "we literally are going to have humanity harmonize all at once" in support of a binding international accord to limit heat-trapping greenhouse gas emissions.

He said the purpose is "to have a billion voices with one message - to demand climate action now" from governments rather than to continue the world's reliance on fossil fuels.

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