Global warming is now pushing heat levels into territory humans cannot tolerate. The only way to avoid being carried further, and more frequently, into uncharted heat territory is to reduce greenhouse gas emissions to net zero.

As global temperatures rise and the human population expands, more of the planet is vulnerable to desertification, the permanent degradation of land that was once arable. More than 75% of Earth's land area is already degraded, according to the European Commission's World Atlas of Desertification, and more than 90% could become degraded by 2050.

Extreme weather events could become the norm by 2050. Research published in the journal Nature Communications, found that 250 million people across the globe currently live on land below current annual flood levels and, 110 million live below the high tide line. Flooding and drought extremes will add further pressure on humans and other creatures forcing unprecedented global displacement.