Editing Urban geography (section)

=== Climate Impact ===
The increasing demand for new building infrastructure within densely populated cities resulted in an increase in air pollution due to the high energy usage within these urban areas. The increasing energy use leads to an increase in heat emissions, which results in global warming.<ref>{{Cite journal |last1=Mirza |first1=Shahid |last2=Niwalkar |first2=Amol |last3=Anjum |first3=Saima |last4=Bherwani |first4=Hemant |last5=Singh |first5=Anju |last6=Kumar |first6=Rakesh |date=2022-06-16 |title=Studying impact of infrastructure development on urban microclimate: Integrated multiparameter analysis using OpenFOAM |journal=Energy Nexus |language=en |volume=6 |pages=100060 |doi=10.1016/j.nexus.2022.100060|s2cid=247811770 |doi-access=free }}</ref> Cities are a key contributor to climate change because urban activities are a major source of greenhouse gas emissions. It was estimated that cities are responsible for about 75% of global carbon dioxide emissions, with the inclusion of transportation and buildings being the largest contributor.<ref>{{Cite web |last=Environment |first=U. N. |date=2017-09-26 |title=Cities and climate change |url=http://www.unep.org/explore-topics/resource-efficiency/what-we-do/cities/cities-and-climate-change |access-date=2022-11-26 |website=UNEP - UN Environment Programme |language=en}}</ref> In order to combat the negative environmental impacts urbanization, many modern cities develop environmentally conscious infrastructure. For instance, the implementation of public transportation such as train and bus systems help to lessen the use of cars within cities. The use of [[solar energy]] can also be found in many commercial and residential buildings, which helps to lessen the reliance on non-renewable energy resources.