Billions at Risk of Living Outside Safe Climate Zones Due to Global Heating

Global heating will force billions of people out of the "climate niche" in which humanity has thrived for centuries, exposing them to unprecedented temperatures and extreme weather. Urgent action to lower carbon emissions and keep global temperature rise to 1.5C would cut the number of people pushed outside the climate niche by 80%, to 400 million. India and Nigeria will face the worst changes, with most people pushed outside the human climate niche. The study highlights the phenomenal human cost of failing to tackle the climate emergency.