I now have a good grasp on Global warming.
global warming is like of a worm, inching up a wall, slowly, this represents the gradual rising earth temperatures due to man's influences.
This wall turns out to be the wall of the inside of a stopped elevator! and someone presses the "down" button, and down she goes. goes down faster than this worm is climbing upwards: the net gain is now a "Minus"!
[other factors and cycles over ride the global warming.]
probably in this next maybe-oncoming new Ice Age, global warming means that the never ending blizzards in the north lands will have a temperature of only 18 degrees far. instead of the non-global warmness of 16 degrees far.!