The article looked at how much carbon dioxide was released in Guangzhou City due to using energy between 1992 and 2007. They found that overall carbon emissions increased each year, but emissions per person went up too. However, carbon emissions for each unit of economic activity actually went down over time. The way energy was used in the city didn't really change much, though. The study revealed that as the population and economy grew, carbon emissions also increased. But making energy use more efficient could lead to less carbon being released. To decrease carbon emissions in the city, it's important to control population growth, change the kinds of industries in the area, improve technology, use less energy, and make better use of the energy we have.