An answer to global warming?

An article by Keay Davidson in the San Francisco Chronicle suggests that man-made global warming isn't the only climate effect we need to worry about:

A regional nuclear war between Third World nations could trigger planetwide cooling that would likely ravage agriculture and kill millions of people, scientists reported Monday.

For many years, Western military scientists and strategists have assumed that the damage from small-scale regional nuclear wars would be limited to continents on which they occurred. Now, in a revamping of the "nuclear winter" debate of the 1980s, new and far more sophisticated computer models show that even these little nuclear wars could create global devastation.