Scientists checked the carbon footprint for 13,000 cities worldwide. These were the worst.
▻https://mic.com/articles/189651/scientists-checked-the-carbon-footprint-for-13000-cities-worldwide-these-were-t
Seoul came in at No. 1, with an output of 276.1 metric tons (plus or minus roughly 51.8 metric tons) of carbon dioxide a year. Guangzhou, China, came was ranked at No. 2, followed by New York City; Hong Kong; Los Angeles; Shanghai; Singapore; Chicago; Tokyo/Yokohama, Japan; and Riyadh, Saudi Arabia.
This map built by researchers at the Norwegian University of Science and Technology show carbon emission levels for 13,000 cities worldwide. Norwegian University of Science and Technology/▻http://citycarbonfootprints.info 