Where does the aurora borealis occur in the layers of the atmosphere?

What is one benefit of a non renewable resource, such as natural gas? a. generates large amounts of electricity b. less expensive c. produces pollution d. will run out eventually

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only