DAVOS, Switzerland (AP) — Leaders gathered in the Swiss ski resort of Davos are pushing for nations worldwide to shift to cleaner energy sources as the best way to contain global warming and re-energize the global economy.

U.N. climate chief Christiana Figueres, reflecting the top billing that climate change has in Davos this year, said the world economy is at risk unless a binding deal is agreed in Paris in 2015 to lower heat-trapping carbon emissions from coal and oil.