China is currently the world’s largest energy consumer and CO₂ emitter, and its cities contribute 85% of the total CO₂ emissions in China. Given the magnitude and growth rate of Chinese cities’ carbon emissions, cities are considered to be the key areas for implementing policies designed to adapt to climate change and mitigate CO₂ emissions.

A sampling of Belfer Center fellows and affiliates in the news.

This study summarizes the key features and drivers of China’s regional carbon emissions and conclude with suggestions for a low carbon policy for China.

International trade has become the fastest growing driver of global carbon emissions, with large quantities of emissions embodied in exports from emerging economies. International trade with emerging economies poses a dilemma for climate and trade policy: to the extent emerging markets have comparative advantages in manufacturing, such trade is economically efficient and desirable. However, if carbon-intensive manufacturing in emerging countries such as China entails drastically more CO2 emissions than making the same product elsewhere, then trade increases global CO2 emissions.

The authors findings suggest that overestimation of China's emissions in 2000–2013 may be larger than China's estimated total forest sink in 1990–2007 or China's land carbon sink in 2000–2009.The revisions of the Chinese emissions are substantial enough that they may lead to adjustments in the Global Carbon Cycle.

China is the world's largest emitter of carbon dioxide, accounting for one-quarter of the global total in 2013. Although the country has successfully lowered the rate of emissions from industry in some cities through improved technology and energy-efficiency measures, rapid economic growth means that more emissions are being added than removed. Without mitigation, China's CO2 emissions will rise by more than 50% in the next 15 years.

The magnitude and growing annual rate of growth of China's carbon emissions make this country the major driver of global carbon emissions and thus a key focus for efforts in emissions mitigations. This report presents independent data on China's carbon emissions from 1950–2012, and provides a basis to support mitigation efforts and China's low-carbon development plan.

Knowing the carbon emission baseline of a region is a precondition for any mitigation effort, but the baselines are highly dependent on the system boundaries for which they are calculated. On the basis of sectoral energy statistics and a nested provincial and global multi-regional input–output model, the authors calculate and compare four different system boundaries for China's 30 provinces and major cities.

China committed itself to reduce the carbon intensity of its economy (the amount of CO2 emitted per unit of GDP) by 40–45% during 2005–2020. Yet, between 2002 and 2009, China experienced a 3% increase in carbon intensity, though trends differed greatly among its 30 provinces. Decomposition analysis shows that sectoral efficiency gains in nearly all provinces were offset by movement towards a more carbon-intensive economic structure.