CO2 emissions rose because of a 2.1 percent increase in global energy demand, 70 percent of which was met by fossil fuels, especially natural gas and coal-fired electricity. China’s 6 percent jump in electricity demand was met by coal, IEA reported...A major reason emissions rose was because the world economy grew 3.7 percent last year. Higher economic growth means more emissions, despite claims that economic growth had begun to “decouple” from greenhouse gas emissions.
'Pollution in the atmosphere is having an unexpected consequence, scientists say—it's helping to cool the climate, masking some of the global warming that's occurred so far. That means efforts worldwide to clean up the air may cause an increase in warming, as well as other climate effects, as this pollution disappears.' ... 'The new study relied on four global climate models, which the researchers used to simulate the effects of removing all human-caused emissions of the major aerosols, including sulfate and carbon-based particles like soot. The resulting global warming, they concluded, would be anywhere from 0.5 to 1.1 degrees Celsius.'