The United States and China have unveiled a secretly negotiated deal to reduce their greenhouse gas output, with China agreeing to cap emissions for the first time and the US committing to deep reductions by 2025.
The pledges in an agreement struck between President Barack Obama and his Chinese counterpart, Xi Jingping, provide an important boost to international efforts to reach a global deal on reducing emissions beyond 2020 at a United Nations meeting in Paris next year.
China, the biggest emitter of greenhouse gases in the world, has agreed to cap its output by 2030 or earlier if possible. Previously China had only ever pledged to reduce the rapid rate of growth in its emissions. Now it has also promised to increase its use of energy from zero-emission sources to 20% by 2030.
The United States has pledged to cut its emissions to 26-28% below 2005 levels by 2025.
The European Union has already endorsed a binding 40% greenhouse gas emissions reduction target by 2030.
Speaking at a joint press conference at the Great Hall of the People, Obama said: As the worlds largest economies and greatest emitters of greenhouse gases we have special responsibility to lead the global effort against climate change. I am proud we can announce a historic agreement. I commend President Xi, his team and the Chinese government for their making to slow, peak and then reverse Chinas carbon emissions.
He said the US emissions reductions goal was ambitious but achievable and would double the pace at which it is reducing carbon emissions.
This is a major milestone in US-China relations and shows what is possible when we work together on an urgent global challenge.