The study looked at how Dujiangyan City was using up its natural resources by measuring its ecological footprint in 1999 and 2002. They found that the city was using more than it could sustain, leading to a deficit in both years. The deficit was even worse in 2002 than in 1999, showing that the city was putting too much pressure on its environment due to human activities like production and living. If the city continues this way with a growing economy and population, the situation will get worse. To fix this, it's crucial to promote eco-friendly consumption and reduce the strain on the environment.