The document says the world has the technology and wealth now to act decisively in time to avoid a sharp rise in temperatures that scientists say would wipe out species, raise ocean levels, trigger droughts in some places and flooding in others, and wreak economic havoc. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! BANGKOK, Thailand – From nuclear power to reforestation to better toasters, the world now has a game plan from climate experts for fighting global warming, a report their chief scientist says will have a “profound influence” on upcoming negotiations. American officials questioned the economic cost, and the Chinese questioned whether fast results could be achieved. But a leading expert said there was little choice. “If we continue doing what we are doing now, we are in deep trouble,” said Ogunlade Davidson, co-chairman of the U.N.-sponsored group that produced the report, approved by consensus by more than 120 nations Friday at the end of a weeklong meeting. A 35-page summary of a 1,000-plus-page study, the report said the world must significantly cut emissions of carbon dioxide and other greenhouse gases by sharply improving energy efficiency in buildings, vehicles and even kitchen appliances; shifting from fossil fuels to nuclear, wind, solar and other renewable energy sources; saving forests as “carbon sinks”; capping agricultural emissions; and taking many other steps.