That the average global temperature , like the output of the Sun, is pretty much a constant.
The changes in our 'weather' or 'climate' are due to weather patterns (climate) moving to somewhere else. The 'weather' is not anchored to the ground.
The Desert in Egypt was not always a desert. Underwater Volcanoes affect ocean currents and temperatures. On land volcanoes affect local temperatures. The Jet stream movement causes shifts in weather patterns. The most whimsiest of things, clouds, are the most powerful factor in local temperature change.
The one thing that doesn't change the weather is CO2.
Right. “Why Hasn’t The Earth Warmed In Nearly 15 Years?”
Two words: Global Stagnation. In the 1970’s, too much carbon dioxide was reflecting sunlight into outer space, threatening another ice age. This turned around in the eighties when the carbon went into a greenhouse gas cycle and trapped heat in the atmosphere. Now the temperature is back to where it was 15 years ago. Carbon Dioxide has given us nothing but millenia of global stagnation.
The problem is our oppressive carbon cycle that thus far has dominated all life on earth. Real change would mean would mean bringing an end to carbonaceous organic matter. This may cause some discomfort at first. And to others, putting all living things into gas chambers, or adding sterilizing chemicals to water supplies, would seem to be only half measures. But this could be followed up by moving, and moving and fast, into to silicon based life forms.
How about throwing a trillion or two at General electric, then having the President institute a a “Silicon Cycle” committee chaired by Al Gore? Barak Obama himself could take on the task of training 10,000 silicon life form engineers.