The headings in this section provide links to some of the topics in the Ideas Bank. Click on the Ideas Bank link, or to see a full list of topics. Niterói is a particpant of the United Nations Environment Programme's Climate Neutral Network The Brazilian municipality of Niterói is the first city in South America to join the CN Net. Located just across the Guanabara Bay from Rio de Janeiro, the city has a population of 500,000. The municipality is taking the issue of climate change as a priority and has set targets in the areas of transport, energy and waste.