On September 22 China’s President Xi has delivered the country’s new pledge to reach peak carbon emissions earlier than 2030 and carbon neutrality by 2060 to the UN General Assembly. If pursued, this pledge marks a fundamental shift in China’s global climate ambitions and will have profound long-term impact on the global economy and energy markets. How sustainable will this impact be for the globe? Well, it all depends. Maria Pastukhova has the details.