This is an infrared aerial photo I got from:
http://cimss.ssec.wisc.edu/tropic/real-time/shemi/images/xxirgms5wn.GIF
In infrared map allows us to see variations in surface/object temperature. Warm objects emit infrared light, and the hotter the surface, the shorter the wavelength, thus you see a corresponding glow (e.g. red light). This enables weather forcasters to notice storms, or rescue workers to locate warm bodies in oceans, or in forests through vegetation or fog.
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