The summary went through each continent detailing risks and possible ways that countries can adapt to them.
For North America, the highest risks over the long term are from wildfires, heat waves and flooding. Water — too much and too little — and heat are the biggest risks for Europe, South America and Asia, with South America and Asia having to deal with drought-related food shortages.
Africa gets those risks and more: starvation, pests and disease. Australia and New Zealand get the unique risk of losing their coral reef ecosystems, and small island nations have to be worried about being inundated by rising seas.
Field said experts paint a dramatic contrast of possible futures, but because countries can lessen some of the harms through reduced fossil fuel emissions and systems to cope with other changes, he said he does not find working on the report depressing.
“The reason I’m not depressed is because I see the difference between a world in which we don’t do anything and a world in which we try hard to get our arms around the problem,” he said.