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Explain how trees can "fall up." How does this situation help the local economy?

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

In what way does renewable energy differ form nonrenewable energy?

Where the main factor that enabled the growth of cities and civilizations was the existence of