MOSCOW (Reuters) - The Paris climate deal is unworkable without the participation of the United States, the RIA news agency cited Kremlin aide Andrei Belousov as saying on Friday. On Monday, President Donald Trump said the United States would be withdrawing from the 2015 landmark deal which is designed to fight climate change. Trump said the Paris accord would undermine the U.S. economy, cost U.S. jobs, weaken American national sovereignty and put the country at a permanent disadvantage to the other countries of the world. Russia has signed but not yet ratified the Paris accord. RIA cited Deputy Prime Minister Arkady Dvorkovich as saying earlier on Friday that Russia would not alter its decision to join the agreement despite the U.S. withdrawal. 