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For indicator 1.1 material consumption, there is an option to calculate ecological footprint instead of waste per capita. The first resource listed http://www.ecocityfootprint.org is not accessible and the second one is for individuals not cities http://www.footprintnetwork.org. The last resource listed is for Brazil only https://www.dopastoaoprato.com.br/index.html. So how do we calculate the ecological footprint of a city?