FILE - In this Nov. 6, 2007, file photo, a polar bear mother and her two cubs are seen in Wapusk National Park on the shore of Hudson Bay near Churchill, Manitoba. About a third of the world's polar bears could face imminent threat from greenhouse gas emissions in as soon as a decade, according to a new report by the U.S. Geological Survey released Tuesday, June 30, 2015. The effects of diminished sea ice will lead to population declines throughout the century, and scientists didn't see a rebound in population numbers from the modeling that went up to the year 2100, according to the report. (Jonathan Hayward/The Canadian Press via AP, File) MANDATORY CREDIT

ANCHORAGE, Alaska (AP) — A government report indicates about a third of the world’s polar bears could be in imminent danger from greenhouse gas emissions as soon as 2025.

The U.S. Geological Survey says updated scientific models don’t bode well for polar bear populations across the world, especially in Alaska, the only U.S. state with the white bears.

FILE - In this Nov. 6, 2007, file photo, a polar bear mother and her two cubs are seen in Wapusk National Park on the shore of Hudson Bay near Churchill, Manitoba. About a third of the world's polar bears could face imminent threat from greenhouse gas emissions in as soon as a decade, according to a new report by the U.S. Geological Survey released Tuesday, June 30, 2015. The effects of diminished sea ice will lead to population declines throughout the century, and scientists didn't see a rebound in population numbers from the modeling that went up to the year 2100, according to the report. (Jonathan Hayward/The Canadian Press via AP, File) MANDATORY CREDIT
FILE – In this Nov. 6, 2007, file photo, a polar bear mother and her two cubs are seen in Wapusk National Park on the shore of Hudson Bay near Churchill, Manitoba. About a third of the world’s polar bears could face imminent threat from greenhouse gas emissions in as soon as a decade, according to a new report by the U.S. Geological Survey released Tuesday, June 30, 2015. The effects of diminished sea ice will lead to population declines throughout the century, and scientists didn’t see a rebound in population numbers from the modeling that went up to the year 2100, according to the report. (Jonathan Hayward/The Canadian Press via AP, File) MANDATORY CREDIT
FILE – In this Nov. 6, 2007, file photo, a polar bear mother and her two cubs are seen in Wapusk National Park on the shore of Hudson Bay near Churchill, Manitoba. About a third of the world’s polar bears could face imminent threat from greenhouse gas emissions in as soon as a decade, according to a new report by the U.S. Geological Survey released Tuesday, June 30, 2015. The effects of diminished sea ice will lead to population declines throughout the century, and scientists didn’t see a rebound in population numbers from the modeling that went up to the year 2100, according to the report. (Jonathan Hayward/The Canadian Press via AP, File) MANDATORY CREDIT

The report released this week is part of the government’s recovery plan for the polar bear. It’s expected to be published Thursday in the Federal Register.

Greenhouse gases are blamed for the climate warming that’s reducing the polar bear’s summer sea ice habitat. The effects of diminished sea ice are projected to lead to population declines throughout the century.

Scientists saw no rebound in population numbers in their research models, which stretched to the year 2100.