In March, the Intergovernmental Panel on Climate Change released its latest comprehensive synthesis of climate change research. The report concludes that “impacts from recent climate-related extremes, such as heat waves, droughts, floods, cyclones, and wildfires, reveal significant vulnerability and exposure of some ecosystems and many human systems to current climate variability.”

World Population Day began in 1987 after public imagination was sparked by the idea that there could be 5 billion people on Earth. Today, we’re well past 7 billion and according to the latest UN projections, headed north of 9 billion by mid-century.

As the largest-ever generation of young people enters adulthood, armed conflict is having a profound effect on their future. People under the age of 24 comprise nearly half the world’s population but are the primary participants in conflict today. Conflict is more prevalent in younger societies, and half of all forcibly displaced people are children.

“You can look into the future a couple decades and get a very good idea about where countries are going,” said Richard Cincotta during a presentation at the National Defense University last summer – at least when it comes to demography.

Despite the threat posed by flooding and sea-level rise, relatively little attention has been paid to the potential for environmentally induced instability in coastal West African cities. However, current trends, including rapid population growth, land use patterns, and increasing climate impacts, suggest the costs of inaction in these urban areas are rising.

To date, there have been two proposed responses to climate change: mitigation, aimed at stopping the buildup of greenhouse gases, and adaptation, focused on accommodating ourselves to a warmer world. There is a third option, however, that is increasingly relevant: suffering.

When she finished her dissertation on migration as a response to climate change in 2003, it was one of only a handful of scholarly papers published on the topic that year, said Susana Adamo, an associate research scientist at Columbia University’s Center for International Earth Science Information Network. But in the decade since, interest in climate migration has exploded – in 2012, more than 10 times as many papers were published. [Video Below]