Leading world politicians and industrialists have reached a new, non-binding agreement at a meeting in the United States on tackling climate change. Delegates agreed that developing countries would have to face targets for cutting greenhouse gas emissions as well as rich countries. The meeting in Washington of the G8+5 Climate Change Dialogue also agreed that a limit should be decided for maximum acceptable carbon dioxide levels in the atmosphere, the NBC reported. A global market should be formed to cap and trade carbon dioxide emissions, they also said.