The study looked at how city development affects global warming by using a computer model to understand how energy use in cities impacts climate change. They focused on how urban planning can influence a country's energy needs. The research showed that planning cities to be less crowded can reduce a nation's reliance on imported energy. By controlling how cities grow, governments can make it easier to meet carbon emission targets set by international agreements, and they can use city planning to reduce the financial burden of new carbon taxes.