It has plagued scientists and politicians for decades, but scientists now say global warming is not the problem.
We are actually heading for the next Ice Age, they claim.
British and Canadian experts warned the big freeze could bury the east of Britain in 6,000ft of ice.
Most of Scotland, Northern Ireland and England could be covered in 3,000ft-thick ice fields.
The expanses could reach 6,000ft from Aberdeen to Kent – towering above Ben Nevis, Britain’s tallest mountain.
The Earth has seen dramatic climate fluctuations – veering between cold and warm extremes - over the past three million years, the researchers say.
And changes in the Earth’s orbit and slowly falling levels of carbon dioxide are the cause.
The team says we are approaching a turning point, in the next 10,000 to 100,000 years, which will lead to the new ice sheets smothering much of Europe, Asia and South America.