Read here. Let's say you're the typical climate scientist who seeks fame and fortune by publishing studies supporting the AGW hypothesis. How do you do this? First, you gotta find a sympathetic, AGW agenda-driven, "science" journal that at least allows you to publish a color temperature change scale such as figure 1. (Hint: Try "Journal of Climate" - apparently not the brightest of the climate science peer journals.)
See, you need to really buff-up your study, and the quickest way to do that is to start with the color red. It's simple, just make the zero temperature change mark red and all changes above it slightly redder. Now when a person views your charts, they'll see nothing but hot, hot and even more hot!
And for god's sake, don't be like those nutters, the Chinese. Never, ever create a temperature change color scale that doesn't flatter and embellish the "Agenda." Don't forget, an objective scientist is not a winning scientist. As a lesson, figure 2 by the Chi-coms is definitely not the way to impress the research funding sponsors as to your global-warming creds.
Remember, the future green stuff in your wallet always starts with red. Your mantra for the day: Live lies and prosper!