The satellite image can help you find the forest. When we look at trees and grass, we see green. The grass reflects green light and absorbs all the other colors. But grass and trees also reflect light we cannot see. This light is called infrared light.
Special film is used to record infrared information.
Since we cannot see infrared light, scientists give it a color Red is the color most commonly used to show this light, but it can be shown in any color. Special sensors on the satellites can also record infrared light.