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07/10/2020 - One of the UN’s Sustainable Development Goals aims to ensure access to transport infrastructure for all. A team of researchers led by the Potsdam Institute for Climate Impact Research (PIK) has now brought together various data sets to quantify the economic costs as well as climate implications of achieving this goal by providing universal road access. The result: While such road extension would weigh very heavily on individual countries’ budgets, on the global CO2 emissions budget it would not. To connect almost all the world’s population, the global road network would only need to be extended by 8 per cent, causing a total CO2 emissions of about 1.5 per cent of what we can emit while keeping global warming below 2 degree Celsius.