Gore and Carter both deserved theirs.
Gore received his for global warming. If (man-made) global warming is real it can be justified.
Watch this video:
He begins speaking at about one minute mark and you really only need to see to about the 5 minute mark.
Just for fun...some quotes I have saved away (note the dates of the predictions):
Warming: Is our climate changing? The succession of temperate summers and open winters through several years, culminating last winter in the almost total failure of the ice crop throughout the valley of the Hudson, makes the question pertinent...- New York Times June 23, 1890
Cooling: The question is again being discussed whether recent and long-continued observations do not point to the advent of a second glacial period, when the countries now basking in the fostering warmth of a tropical sun will ultimately give way to the perennial frost and snow of the polar regions - New York Times - February 24, 1895
Cooling: “Fifth ice age is on the way…..Human race will have to fight for its existence against cold.” – Los Angles Times October 23, 1912
Warming: The Arctic ocean is warming up, icebergs are growing scarcer and in some places the seals are finding the water too hot... - Washington Post 11/2/1922
Cooling: Scientist says Arctic ice will wipe out Canada, Professor Gregory of Yale University stated that “another world ice-epoch is due.” He was the American representative to the Pan-Pacific Science Congress and warned that North America would disappear as far south as the Great Lakes, and huge parts of Asia and Europe would be “wiped out.” – Chicago Tribune August 9, 1923
Warming: weather men have no doubt that the world at least for the time being is growing warmer.” – Time Magazine Jan. 2 1939
Cooling: After a week of discussions on the causes of climate change, an assembly of specialists from several continents seems to have reached unanimous agreement on only one point: it is getting colder. - New York Times - January 30, 1961
...One can literally go on in this fashion up to today. Yet, this is what we gave Gore a Nobel Prize for.