Leading world politicians and industrialists have reached a new, non-binding agreement at a meeting in the United States on tackling climate change.

The two-day meeting brought together legislators from countries including the Group of Eight rich nations plus Brazil, China, India, Mexico and South Africa. Delegates agreed that developing countries will have to face targets for cutting greenhouse gas emissions as well as rich countries.

The non-binding 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. A global market should be formed to cap and trade carbon dioxide emissions, they also said.

The US senator Joe Lieberman told the forum yesterday that he believed the American legislators would introduce greenhouse gas cutting laws in the near future “after many years of denial and in-action” on global warming.