The researchers studied how the structure of industries and energy sources in Hebei province affect its carbon intensity. They used special math methods to analyze the data. Results from 2000 to 2012 showed that Hebei's overall and industrial carbon intensity decreased each year. The energy consumption structure was a big factor in lowering carbon intensity, but the impact of industry structure was less consistent. Overall, improving the structure of industries and energy use could help cut down on Hebei's carbon emissions.