Humanity is heading toward “climate apartheid.” The wealthy will pay to escape global warming, famine, and conflict, while the poorest will suffer the worst consequences. By 2050, Bangladesh will have a population of about 220 million, and much of its territory will be permanently submerged. This situation could lead to the forced displacement of between 10 and 30 million people living along the country’s southern coast, forcing many Bangladeshis to flee the country as “climate refugees”—a group expected to reach 250 million people worldwide by mid-century. On a global scale, we are talking about the largest mass migration in human history. How long will Dhaka be able to cope with the influx of so many people? Where will these people go when the cities collapse? Who will take them in? We are sitting on a massive ticking time bomb.