FILE - In this April 15, 2021, file photo, President Joe Biden speaks in the East Room of the White House in Washington. No nation offers asylum or other protections to people displaced because of climate change. Biden’s administration is studying the idea, and climate migration is expected to be discussed at his first climate summit. (AP Photo/Andrew Harnik, File)
FILE - In this March 28, 2021, file photo, Carlos Enrique Linga and his daughter Betty Noemi talk to a reporter at Our Lady of Guadalupe Catholic Church in Mission, Texas, on Palm Sunday. No nation offers asylum or other legal protections to people displaced specifically because of climate change, but the Biden administration is studying the idea. Linga traveled to the U.S. border with his 5-year-old daughter after rains from back-to-back hurricanes caused landslides and flooding that destroyed more than 60,000 homes in Guatemala alone, including Linga's farm and home. (AP Photo/Dario Lopez-Mills, File)
FILE - This March 30, 2004, file photo, shows Tarawa atoll, Kiribati. Ioane Teitiota and his wife fought for years to be allowed to stay in New Zealand as refugees, arguing that rising sea levels caused by global warming threaten the very existence of their tiny Pacific nation of Kiribati, one of the lowest lying countries on Earth. (AP Photo/Richard Vogel, File)
SAN DIEGO — Ioane Teitiota and his wife fought for years to stay in New Zealand as refugees, arguing that rising sea levels caused by climate change threaten the very existence of the tiny Pacific island nation they fled, one of the lowest-lying countries on Earth.