Is it just me or is the A Crack In The Sky future starting to feel less and less like sci-fi?

Heat-Trapping Gas Passes Milestone, Raising Fears

THE NEW YORK TIMES, May 10, 2013

The level of the most important heat-trapping gas in the atmosphere, carbon dioxide, has passed a long-feared milestone, scientists reported Friday, reaching a concentration not seen on the earth for millions of years…The best available evidence suggests the amount of the gas in the air has not been this high for at least three million years, before humans evolved, and scientists believe the rise portends large changes in the climate and the level of the sea…   (read full article)