LONDON (AP) - Two British Cabinet ministers are showing off a doomsday vision of disappearing cities and rising seas in an effort to push nations to strike a new pact on curbing emissions of global warming gasses.

Foreign Secretary David Miliband and his brother, Energy and Climate Change Secretary Ed Miliband, planned Thursday to publish a map detailing the predicted impact of a 4 degrees Celsius (7 Fahrenheit) rise in global temperatures.

The map has been prepared by scientists at the British Meteorological Office.

Nations meeting at a summit in Denmark in December aim to strike agreement on new action to limit temperature rises as a result of climate change to 2 degrees Celsius.

Britain has pledged to cut carbon dioxide emissions by at least 80 percent by 2050.