33% of China's carbon footprint is to make exports. Most of the exports go to developed countries like the USA, Europe, Canada and Japan.
Matching the model to the dataset allowed the team to calculate that, in 2005, export sectors generated 1.7 billion tonnes of carbon dioxide – 33% of China's emissions. Data is not yet available for more recent years. The calculation was done by Christopher Weber of Carnegie Mellon University in Pittsburgh, Pennsylvania, and colleagues.