A white Christmas is only a memory in most of the United States, according to Dale Kaiser and Kevin Birdwell, of the Oak Ridge National Laboratory.

Looking at the snowfall in16 cities?mainly in the north?since 1960, the number of white Christmases per decade declined from 78 during the 1960s to 39 in the 1990s.People in Chicago, for example, saw the number of white Christmases, defined as at least one inch of snow on the ground, drop from seven in the 1960s to two during the 1990s. In New York, the number declined from five in the 1960s to one this past decade, and Detroit had just three white Christmases in the 1990s versus nine in the 1960s.
read more

The National Academy of Sciences says that global warming could trigger ?large, abrupt and unwelcome? climatic changes that could severely affect ecosystems and human society.

This fulfills the scenario in ?The Coming Global Superstorm,? published last year by Whitley Strieber and Art Bell. The warning comes six months after they informed the White House that global warming is indeed real, largely the result of human activity and likely to cause adverse effects.
read more

Scientists warn that agricultural harvests in some parts of the world could fall by about one-third as global temperatures increase. Farmers growing crops like rice and wheat will find it harder to set seed, and they will have to find new places to grow crops like tea and coffee.
read more

Researchers may have been overestimating the degree of warming that the Earth will experience in the future. This has been revealed by studies of the release of carbon dioxide back into the atmosphere from the soil, a process known as soil respiration. A team at the University of Oklahoma spent a year artificially warming areas of the prairie at a fixed level above the air temperature and comparing the results with unheated areas.
read more