At the library I recently picked up Dead Heat: The Race Against The Greenhouse Effect, by Michael Oppenheimer and Robert H. Boyle, published in 1990.
The first chapter is the most interesting. It's written from the point of view of 2050, if we don't do enough to stop the upcoming catastrophe. The authors understand that no scenario can perfectly portray the future, but they do explain what they write is all too plausible, "distilled from scientific understanding" and based on a "business-as-usual" scenario. Here's a sample:
America and Canada also suffered from "black blizzards" starting in 1996, with prairie topsoil darkening the skies. American grain reserves hit zero. When "the Indian monsoon failed in 2005, no one could help avoid the famine." (Russian wheat went to help the starving Ukraine.)
Forest death hit the East Coast, and by 2010 the red spruce disappeared from Vermont. There was regular fire and smoke from New England to Pennsylvania.
"In 1993 and 1996, heat waves struck the Southeast, cutting corn and soybean production by 50 percent." "By 2015, more than 30 percent of southeastern farmland had been abandoned." Crime and drug use skyrocketed in the South.
Starting in 1997, there was the first in a series of "super hurricanes" in the Atlantic and Gulf of Mexico, creating a tidal wave that drowned 22,000 people in the Florida Keys. (In comparison, Hurricane Katrina killed less than 2000.)
In 2004, a "dome of fetid air" stretched along the East Coast, and water was rationed in New York. "Smoke from dying forests" "stung eyes and throats." All the damage caused rioting.
In 2007, shrinkage of the ice pack caused mass die-offs of various animals as the effect--starting with algae that grows on the pack ice--worked its way up the food chain.
So there you have it.