China and the United States are expected to give the Paris climate change agreement a big push forward as the world's largest economies gather for the G20 summit this weekend, including potentially jointly announcing their ratification of the deal and action to curb fossil fuel subsidies, experts say.

Many of the new climate change-related developments within the Strategic and Economic Dialogue emerged from a summit that brought U.S. and Chinese policymakers and private sector leaders together to establish cooperative relationships. Benjamin Reynolds describes some of the interesting and practical agreements on energy and climate change between private and public sectors, but also reminds us that previous climate accords have always struggled to enforce climate targets that are often conveniently forgotten after big summits.

China and the U.S. are actively promoting the changes set out in the Paris Climate Agreement signed at the end of April. China’s already shut down enough coal mines to cut CO2 emissions equal to the entirety of Great Britain’s annual emissions, but what else is needed to keep under two degrees Celsius?

Beijing has highlighted its water hegemony over downstream countries by releasing some dammed water for drought-hit nations in the lower Mekong River basin. Brahma Chellaney argues that this unilateralist approach underscores the imperative for institutionalized water cooperation in Asia, based on a balance between rights and obligations.

Roughly $10 trillion per year, or 12% of the global economy, is now in play fighting climate change. Properly invested in zero emission energy, transport and business infrastructure of tomorrow. Key to the success of a future clean energy economy will be liberalization of energy markets, which partially exists in the U.S. operation of nationwide natural gas distribution system. Critical reforms along these lines also are underway in China.

Vice Premier Zhang Gaoli is representing China at the signing ceremony for the Paris Agreement at the United Nations in New York on Friday. China will be joining the United States, India and over 100 other nations in signing the agreement on the first day it is open for signing.

President Obama and President Xi Jinping of China said Thursday that they would sign the Paris Agreement on climate change on April 22, the first day the United Nations accord will be open for government signatures.

China's carbon emissions, by far the world's highest, may have peaked in 2014, according to a study published on Monday, potentially putting Beijing under pressure to toughen its climate pledges.

The negotiations were tiresome, the jostling was tough and complicated. To save the common homeland of mankind, to guarantee the sustainable development of all countries, the conclusion of the Paris Agreement gives hope and expectation that we can overcome all sorts of difficulties, and we have the wisdom and courage to do so.

The landmark climate deal negotiated last week in Paris is important first step. However, increased coordination and cooperation between developed and developing countries to enable these much-needed reforms is critical. This includes collective learning, building tools to help strengthen institutional capacity and develop green growth policy, expanding peer learning and knowledge sharing, and engaging private investors and public donors.