Resumen de Earth electric
The Earth glows not in a fiery, intense visible light as the sun does. But if one lies down on the ground, he can feel its warmth. If he takes an infrared photo from orbit, he will see the heat radiation it constantly pumps out into the frigid void of space. It is an immense flow of energy--and one that currently goes to waste. A group of researchers at Harvard University thinks people can use some of this heat radiation as it passes out into space to generate electricity. Here, Ashley examines how this can be done.
