A warmer, changing climate is a threat to the entire world. Climate change affects the entire world population, and the Union of Concerned Scientists calls this social issue "one of the most devastating problems humanity has ever faced."
The 800 million people already living in extreme poverty will be impacted most severely. Around the world, people are already noticing warmer winters, more severe storms and rainfall events, and more frequent wildfires. These issues already put stress on governments and systems in many countries.