According to a study by Global Carbon Project, China ranks __________ highest emitter of carbon dioxide in the world.

China increased its emissions to 11.4 billion tons (10.3 billion metric tons), while the U.S. jumped to a shade under 6 billion tons (5.4 metric tons). The European Union spewed 3.9 billion tons (3.5 billion metric tons) and India soared to 2.9 billion tons (2.6 billion metric tons). Overall, the world is spewing about 1,300 tons (1,175 metric tons) of carbon dioxide into the air every second.