China asks US to play constructive role in SCS dispute

In advance of the start of the G20summit, Chinese President Xi Jinping presented documents formally entering China into the Paris climate agreement and U.S. President Barack Obama did the same on his country's behalf after Air Force One touched down.

The US and China - together responsible for 40 percent of the world's carbon emissions - have both formally joined the Paris global climate agreement.

To fulfill its commitment to the Paris climate pact, China will have to cut its carbon emissions per unit of GDP by 60-65 percent by 2030 from 2005 levels, increase non-fossil fuel sources in primary energy consumption to about 20 percent and peak its carbon emissions by 2030, according to the Xinhua News Agency. They also agreed to jointly endorse an amendment to the Montreal Protocol phasing out refrigerants that damage the ozone, as well as join an global agreement capping airline emissions.

"We expect a surge of ratifications around the UN Climate week later in September", said Bill Hare, chief executive of Climate Analytics.

In December a year ago, negotiators from 179 countries and the European Union came out with final details of the Paris Climate Agreement, however, only 23 countries have ratified the accord.

"Hopefully this will encourage other countries to take similar efforts", President Xi said after today's announcement.

"In recent years, the United States and China have made climate change cooperation a pillar of our bilateral relationship", he said.

Mr Obama also told Mr Jinping that the United States would keep monitoring China's commitments on cybersecurity, the White House said.

Trudeau hails new era of China-Canada ties on Beijing visit
He added that although Trudeau had visited China before, this time, he would leave with a "deep" and "new" impression. The announcement comes on the first leg of Prime Minister Justin Trudeau's official visit to China.

President Obama touched down in Hangzhou, China, Saturday afternoon, marking his 10th and final trip to Asia.

Canada's objectives at this summit are expected to range from promoting trade and investment, encouraging other countries to move forward in the fight against climate change and pressing them to use the necessary policy tools to generate growth.

"With China and the United States making this historic step, we now have 26 countries who have ratified and 39 per cent of global emissions accounted for, to be exact", he added.

"All countries will need to raise the ambition of their commitments under the agreement if we're to avoid the worst impacts of climate change and reach a goal of net zero global warming emissions by mid-century", Meyer said. The nations that have joined must also produce at least 55 percent of global emissions.

Ban is scheduled to attend the G20 summit in China Sunday.

Campaigners welcome the move, with World Wildlife Fund saying they had sent "a very powerful signal that there will be real global action on climate change".

Other sore points aired during the conversation included USA concerns over hacking, and pressing Chinese leaders to transition to a market-determined exchange rate and advance financial reforms.

Other countries will tussle over their own ratification, but this will put pressure on G20 countries over the weekend to go quicker with their assurance to phase out subsidies.