The main reason we aren't using more wind mills is because they have been known to kill birds. a.) true b.) false

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?

Does any one know what blood tastes like

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus