They say that global warming started increasing when cars started spewing CO2 out into the atmosphere. But, that is also when the world started to get paved roads. The albedo of asphalt is .04, while the albedo of light colored soil (gravel roads) of .40. That is a 36% increase in reflectivity from asphalt to gravel. That means that the asphalt is storing a lot more heat.
As the number of cars grew, so did the number of roads. The percentage of the earth's crust that was covered, not just with roads, but also parking lots and city buildings, increased dramatically over the next 50 years. Then you start hearing about global warming, or the more PC term now of global climate change. Scientists have assumed that it was due to greenhouse gasses, but what if that is not the case. What if, like spontaneous generation (you know, where they thought rotting meat produced flies spontaneously), they have been chasing a fable. What if global warming exists, but because of the amount of heat absorbing asphalt that we have paved the earth with? The correlation between surface area paved and heat islands, corresponds to the number of cars on the road, population center sizes, and the so called global warming.
Hmm, that wouldn't be a very popular idea. There isn't nearly the same amount of money to be made in ripping the roads out. And your tax payers would get cranky, riding on all those rough roads. But, why hasn't this option been considered? Think about it a bit. I bet the answer comes to you.
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